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    <title>Juegos de Ciencias Naturales@es|||Natural Sciences Games@en|||Jogos de Ciências Naturais@pt|||Jocs de Ciències Naturals@ca|||Natur Zientzietako Jokoak@eu|||Xogos de Ciencias Naturais@gl|||Jeux des Sciences Naturelles@fr|||Naturwissenschaftliche Spiele@de|||Giochi di Scienze Naturali@it||| - Didactalia - Resources</title>
    <link>https://naturalsciences.didactalia.net/games/tag/calcio?rss</link>
    <description>Natural Science Games. Play to learn the bones, muscles and systems of the human body, and other Natural Science items.
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      <title>Juegos de Ciencias Naturales@es|||Natural Sciences Games@en|||Jogos de Ciências Naturais@pt|||Jocs de Ciències Naturals@ca|||Natur Zientzietako Jokoak@eu|||Xogos de Ciencias Naturais@gl|||Jeux des Sciences Naturelles@fr|||Naturwissenschaftliche Spiele@de|||Giochi di Scienze Naturali@it||| - Didactalia - Resources</title>
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      <link>https://naturalsciences.didactalia.net/games/tag/calcio?rss</link>
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    <item>
      <title>Periodic table, period 1 to 4 without symbols (difficult)</title>
      <link>https://naturalsciences.didactalia.net/resource/periodic-table-period-1-to-4-without-symbols/51ea7b51-c00a-acaa-d036-31de7650e1f7</link>
      <description>&lt;img style="margin:15px" align="left" height="54" width="71" alt="Periodic table, period 1 to 4 without symbols (difficult)" src="https://content.gnoss.ws/imagenes/Documentos/imgsem/51/51ea/51ea7b51-c00a-acaa-d036-31de7650e1f7/f6a5caf7-d357-de98-a4f2-592abd3173bf_240.png"/&gt;&lt;p&gt;In the periodic table of the elements, each row of the table is called the period. The number of levels an atom has determines the period to which it belongs. The first period has only two elements, the second and third periods have eight elements each and the fourth is eighteen.&lt;/p&gt;

&lt;p&gt;The &lt;strong&gt;periodic table of the elements&lt;/strong&gt; is the way proposed by &lt;strong&gt;&lt;a href="https://es.wikipedia.org/wiki/Dmitri_Mendel%C3%A9yev" target="_blank"&gt;Dmitri Mendeléyev&lt;/a&gt;&lt;/strong&gt; in 1869 to arrange the chemical elements, which are ordered by their atomic number, their electron configuration and their chemical properties. Since its first appearance, this table has been increasing with the discovery of new chemical elements, some present in nature and others originated by man.&lt;/p&gt;

&lt;p&gt;Enlarge or reduce the image with zoom and adjust its size to the screen of your device. You can also click on the image and drag it to center it.&lt;/p&gt;&lt;p&gt;Tags: &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/elemento químico"&gt;elemento químico&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/número atómico"&gt;número atómico&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/configuración electrónica"&gt;configuración electrónica&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/propiedad química"&gt;propiedad química&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/dmitri mendeléyev"&gt;dmitri mendeléyev&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/tabla periódica"&gt;tabla periódica&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/tabla periódica de los elementos"&gt;tabla periódica de los elementos&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/elementos del periodo 1"&gt;elementos del periodo 1&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/elementos del periodo 2"&gt;elementos del periodo 2&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/elementos del periodo 3"&gt;elementos del periodo 3&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/hidrógeno"&gt;hidrógeno&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/litio"&gt;litio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/sodio"&gt;sodio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/magnesio"&gt;magnesio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/berilio"&gt;berilio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/aluminio"&gt;aluminio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/boro"&gt;boro&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/silicio"&gt;silicio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/carbono"&gt;carbono&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/fósforo"&gt;fósforo&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/nitrógeno"&gt;nitrógeno&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/azufre"&gt;azufre&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/oxígeno"&gt;oxígeno&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/cloro"&gt;cloro&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/flúor"&gt;flúor&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/argón"&gt;argón&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/neón"&gt;neón&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/helio"&gt;helio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/potasio"&gt;potasio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/calcio"&gt;calcio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/escandio"&gt;escandio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/titanio"&gt;titanio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/vanadio"&gt;vanadio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/cromo"&gt;cromo&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/manganeso"&gt;manganeso&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/hierro"&gt;hierro&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/cobalto"&gt;cobalto&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/níquel"&gt;níquel&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/cobre"&gt;cobre&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/zinc"&gt;zinc&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/galio"&gt;galio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/germanio"&gt;germanio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/arsénico"&gt;arsénico&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/selenio"&gt;selenio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/bromo"&gt;bromo&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/kriptón"&gt;kriptón&lt;/a&gt;&lt;/p&gt;</description>
      <author>didactalia</author>
      <category>Tabla periódica</category>
      <comments>https://naturalsciences.didactalia.net/resource/periodic-table-period-1-to-4-without-symbols/51ea7b51-c00a-acaa-d036-31de7650e1f7#comments</comments>
      <guid>51ea7b51-c00a-acaa-d036-31de7650e1f7</guid>
      <pubDate>Mon, 16 Dec 2019 17:31:59 GMT</pubDate>
    </item>
    <item>
      <title>Periodic table, periods 1 to 4 with symbols (difficult)</title>
      <link>https://naturalsciences.didactalia.net/resource/periodic-table-periods-1-to-4-with-symbols/569c554a-be00-1f79-a9f9-c4399e310e03</link>
      <description>&lt;img style="margin:15px" align="left" height="54" width="71" alt="Periodic table, periods 1 to 4 with symbols (difficult)" src="https://content.gnoss.ws/imagenes/Documentos/imgsem/56/569c/569c554a-be00-1f79-a9f9-c4399e310e03/5c9dc408-9201-6419-7b4d-501a7e07f6a9_240.png"/&gt;&lt;p&gt;In the periodic table of the elements, each row of the table is called the period. The number of levels an atom has determines the period to which it belongs. The first period has only two elements, the second and third periods have eight elements each and the fourth is eighteen.&lt;/p&gt;

&lt;p&gt;The &lt;strong&gt;periodic table of the elements&lt;/strong&gt; is the way proposed by &lt;strong&gt;&lt;a href="https://es.wikipedia.org/wiki/Dmitri_Mendel%C3%A9yev" target="_blank"&gt;Dmitri Mendeléyev&lt;/a&gt;&lt;/strong&gt; in 1869 to arrange the chemical elements, which are ordered by their atomic number, their electron configuration and their chemical properties. Since its first appearance, this table has been increasing with the discovery of new chemical elements, some present in nature and others originated by man.&lt;/p&gt;

&lt;p&gt;Enlarge or reduce the image with zoom and adjust its size to the screen of your device. You can also click on the image and drag it to center it.&lt;/p&gt;&lt;p&gt;Tags: &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/elemento químico"&gt;elemento químico&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/número atómico"&gt;número atómico&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/configuración electrónica"&gt;configuración electrónica&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/propiedad química"&gt;propiedad química&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/dmitri mendeléyev"&gt;dmitri mendeléyev&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/tabla periódica"&gt;tabla periódica&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/tabla periódica de los elementos"&gt;tabla periódica de los elementos&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/elementos del periodo 1"&gt;elementos del periodo 1&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/elementos del periodo 2"&gt;elementos del periodo 2&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/hidrógeno"&gt;hidrógeno&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/litio"&gt;litio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/sodio"&gt;sodio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/magnesio"&gt;magnesio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/berilio"&gt;berilio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/aluminio"&gt;aluminio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/boro"&gt;boro&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/silicio"&gt;silicio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/carbono"&gt;carbono&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/fósforo"&gt;fósforo&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/nitrógeno"&gt;nitrógeno&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/azufre"&gt;azufre&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/oxígeno"&gt;oxígeno&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/cloro"&gt;cloro&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/flúor"&gt;flúor&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/argón"&gt;argón&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/neón"&gt;neón&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/helio"&gt;helio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/potasio"&gt;potasio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/calcio"&gt;calcio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/escandio"&gt;escandio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/titanio"&gt;titanio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/vanadio"&gt;vanadio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/cromo"&gt;cromo&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/manganeso"&gt;manganeso&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/hierro"&gt;hierro&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/cobalto"&gt;cobalto&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/níquel"&gt;níquel&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/cobre"&gt;cobre&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/zinc"&gt;zinc&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/galio"&gt;galio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/germanio"&gt;germanio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/arsénico"&gt;arsénico&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/selenio"&gt;selenio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/bromo"&gt;bromo&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/kriptón"&gt;kriptón&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/handitu"&gt;handitu&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/vous"&gt;vous&lt;/a&gt;&lt;/p&gt;</description>
      <author>didactalia</author>
      <category>Tabla periódica</category>
      <comments>https://naturalsciences.didactalia.net/resource/periodic-table-periods-1-to-4-with-symbols/569c554a-be00-1f79-a9f9-c4399e310e03#comments</comments>
      <guid>569c554a-be00-1f79-a9f9-c4399e310e03</guid>
      <pubDate>Mon, 16 Dec 2019 16:48:31 GMT</pubDate>
    </item>
    <item>
      <title>Periodic table, period 4 and 5 without symbols (difficult)</title>
      <link>https://naturalsciences.didactalia.net/resource/periodic-table-period-4-and-5-without-symbols/64c2ce85-d358-1ed9-d8ea-ed03e68c437c</link>
      <description>&lt;img style="margin:15px" align="left" height="54" width="71" alt="Periodic table, period 4 and 5 without symbols (difficult)" src="https://content.gnoss.ws/imagenes/Documentos/imgsem/64/64c2/64c2ce85-d358-1ed9-d8ea-ed03e68c437c/edae8a93-d2f3-1805-9f9e-ef1573c9e4a1_240.png"/&gt;&lt;p&gt;In the periodic table of the elements, each row of the table is called the period. The number of levels an atom has determines the period to which it belongs. The fourth and fifth periods are eighteen each.&lt;/p&gt;

&lt;p&gt;The &lt;strong&gt;periodic table of the elements&lt;/strong&gt; is the way proposed by &lt;strong&gt;&lt;a href="https://es.wikipedia.org/wiki/Dmitri_Mendel%C3%A9yev" target="_blank"&gt;Dmitri Mendeléyev&lt;/a&gt;&lt;/strong&gt; in 1869 to arrange the chemical elements, which are ordered by their atomic number, their electron configuration and their chemical properties. Since its first appearance, this table has been increasing with the discovery of new chemical elements, some present in nature and others originated by man.&lt;/p&gt;

&lt;p&gt;Enlarge or reduce the image with zoom and adjust its size to the screen of your device. You can also click on the image and drag it to center it.&lt;/p&gt;&lt;p&gt;Tags: &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/elemento químico"&gt;elemento químico&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/número atómico"&gt;número atómico&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/configuración electrónica"&gt;configuración electrónica&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/propiedad química"&gt;propiedad química&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/dmitri mendeléyev"&gt;dmitri mendeléyev&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/tabla periódica"&gt;tabla periódica&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/tabla periódica de los elementos"&gt;tabla periódica de los elementos&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/elementos del periodo 4"&gt;elementos del periodo 4&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/elementos del periodo 5"&gt;elementos del periodo 5&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/potasio"&gt;potasio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/rubidio"&gt;rubidio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/calcio"&gt;calcio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/estroncio"&gt;estroncio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/itrio"&gt;itrio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/escandio"&gt;escandio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/titanio"&gt;titanio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/circonio"&gt;circonio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/niobio"&gt;niobio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/vanadio"&gt;vanadio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/cromo"&gt;cromo&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/molibdeno"&gt;molibdeno&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/tecnecio"&gt;tecnecio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/manganeso"&gt;manganeso&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/hierro"&gt;hierro&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/rutenio"&gt;rutenio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/rodio"&gt;rodio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/cobalto"&gt;cobalto&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/níquel"&gt;níquel&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/paladio"&gt;paladio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/plata"&gt;plata&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/cobre"&gt;cobre&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/zinc"&gt;zinc&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/cadmio"&gt;cadmio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/indio"&gt;indio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/galio"&gt;galio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/germanio"&gt;germanio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/estaño"&gt;estaño&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/antimonio"&gt;antimonio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/arsénico"&gt;arsénico&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/selenio"&gt;selenio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/telurio"&gt;telurio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/yodo"&gt;yodo&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/bromo"&gt;bromo&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/kriptón"&gt;kriptón&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/xenón"&gt;xenón&lt;/a&gt;&lt;/p&gt;</description>
      <author>didactalia</author>
      <category>Tabla periódica</category>
      <comments>https://naturalsciences.didactalia.net/resource/periodic-table-period-4-and-5-without-symbols/64c2ce85-d358-1ed9-d8ea-ed03e68c437c#comments</comments>
      <guid>64c2ce85-d358-1ed9-d8ea-ed03e68c437c</guid>
      <pubDate>Mon, 16 Dec 2019 17:30:39 GMT</pubDate>
    </item>
    <item>
      <title>Periodic table, period 4 and 5 without symbols (difficult)</title>
      <link>https://naturalsciences.didactalia.net/resource/periodic-table-period-4-and-5-without-symbols/8bbd3203-ee0e-4a71-649c-37d2bca1d04b</link>
      <description>&lt;img style="margin:15px" align="left" height="54" width="71" alt="Periodic table, period 4 and 5 without symbols (difficult)" src="https://content.gnoss.ws/imagenes/Documentos/imgsem/8b/8bbd/8bbd3203-ee0e-4a71-649c-37d2bca1d04b/9f85bfd6-185e-4bce-188a-b3c1f1894dce_240.png"/&gt;&lt;p&gt;In the periodic table of the elements, each row of the table is called the period. The number of levels an atom has determines the period to which it belongs. The fourth and fifth periods are eighteen each.&lt;/p&gt;

&lt;p&gt;The &lt;strong&gt;periodic table of the elements&lt;/strong&gt; is the way proposed by &lt;strong&gt;&lt;a href="https://es.wikipedia.org/wiki/Dmitri_Mendel%C3%A9yev" target="_blank"&gt;Dmitri Mendeléyev&lt;/a&gt;&lt;/strong&gt; in 1869 to arrange the chemical elements, which are ordered by their atomic number, their electron configuration and their chemical properties. Since its first appearance, this table has been increasing with the discovery of new chemical elements, some present in nature and others originated by man.&lt;/p&gt;

&lt;p&gt;Enlarge or reduce the image with zoom and adjust its size to the screen of your device. You can also click on the image and drag it to center it.&lt;/p&gt;&lt;p&gt;Tags: &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/elemento químico"&gt;elemento químico&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/número atómico"&gt;número atómico&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/configuración electrónica"&gt;configuración electrónica&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/propiedad química"&gt;propiedad química&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/dmitri mendeléyev"&gt;dmitri mendeléyev&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/tabla periódica"&gt;tabla periódica&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/tabla periódica de los elementos"&gt;tabla periódica de los elementos&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/elementos del periodo 4"&gt;elementos del periodo 4&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/elementos del periodo 5"&gt;elementos del periodo 5&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/potasio"&gt;potasio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/rubidio"&gt;rubidio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/calcio"&gt;calcio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/estroncio"&gt;estroncio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/itrio"&gt;itrio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/escandio"&gt;escandio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/titanio"&gt;titanio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/circonio"&gt;circonio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/niobio"&gt;niobio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/vanadio"&gt;vanadio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/cromo"&gt;cromo&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/molibdeno"&gt;molibdeno&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/tecnecio"&gt;tecnecio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/manganeso"&gt;manganeso&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/hierro"&gt;hierro&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/rutenio"&gt;rutenio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/rodio"&gt;rodio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/cobalto"&gt;cobalto&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/níquel"&gt;níquel&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/paladio"&gt;paladio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/plata"&gt;plata&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/cobre"&gt;cobre&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/zinc"&gt;zinc&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/cadmio"&gt;cadmio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/indio"&gt;indio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/galio"&gt;galio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/germanio"&gt;germanio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/estaño"&gt;estaño&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/antimonio"&gt;antimonio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/arsénico"&gt;arsénico&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/selenio"&gt;selenio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/telurio"&gt;telurio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/yodo"&gt;yodo&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/bromo"&gt;bromo&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/kriptón"&gt;kriptón&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/xenón"&gt;xenón&lt;/a&gt;&lt;/p&gt;</description>
      <author>didactalia</author>
      <category>Tabla periódica</category>
      <comments>https://naturalsciences.didactalia.net/resource/periodic-table-period-4-and-5-without-symbols/8bbd3203-ee0e-4a71-649c-37d2bca1d04b#comments</comments>
      <guid>8bbd3203-ee0e-4a71-649c-37d2bca1d04b</guid>
      <pubDate>Mon, 16 Dec 2019 17:30:55 GMT</pubDate>
    </item>
    <item>
      <title>Periodic table, alkaline earth group without symbols (difficult)</title>
      <link>https://naturalsciences.didactalia.net/resource/periodic-table-alkaline-earth-group-without/9559bc54-b9b2-8c97-4a5d-95e4a1582f25</link>
      <description>&lt;img style="margin:15px" align="left" height="54" width="71" alt="Periodic table, alkaline earth group without symbols (difficult)" src="https://content.gnoss.ws/imagenes/Documentos/imgsem/95/9559/9559bc54-b9b2-8c97-4a5d-95e4a1582f25/47e270e9-8f59-c43d-604d-682686bac637_240.png"/&gt;&lt;p&gt;The alkaline earths take their name from the one who received their oxides, "earths", which have alkaline properties. They are harder than alkali metals, have shine and are good electrical conductors; however, less reactive than alkaline. They all have two electrons in their outermost layer.&lt;/p&gt;

&lt;p&gt;The &lt;strong&gt;periodic table of the elements&lt;/strong&gt; is the way proposed by &lt;strong&gt;&lt;a href="https://es.wikipedia.org/wiki/Dmitri_Mendel%C3%A9yev" target="_blank"&gt;Dmitri Mendeléyev&lt;/a&gt;&lt;/strong&gt; in 1869 to arrange the chemical elements, which are ordered by their atomic number, their electron configuration and their chemical properties. Since its first appearance, this table has been increasing with the discovery of new chemical elements, some present in nature and others originated by man.&lt;/p&gt;

&lt;p&gt;Enlarge or reduce the image with zoom and adjust its size to the screen of your device. You can also click on the image and drag it to center it.&lt;/p&gt;&lt;p&gt;Tags: &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/elemento químico"&gt;elemento químico&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/número atómico"&gt;número atómico&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/configuración electrónica"&gt;configuración electrónica&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/propiedad química"&gt;propiedad química&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/dmitri mendeléyev"&gt;dmitri mendeléyev&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/tabla periódica"&gt;tabla periódica&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/tabla periódica de los elementos"&gt;tabla periódica de los elementos&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/berilio"&gt;berilio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/magnesio"&gt;magnesio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/calcio"&gt;calcio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/estroncio"&gt;estroncio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/bario"&gt;bario&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/radio"&gt;radio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/alcalinotérreos"&gt;alcalinotérreos&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/metales alcalinotérreos"&gt;metales alcalinotérreos&lt;/a&gt;&lt;/p&gt;</description>
      <author>didactalia</author>
      <category>Tabla periódica</category>
      <comments>https://naturalsciences.didactalia.net/resource/periodic-table-alkaline-earth-group-without/9559bc54-b9b2-8c97-4a5d-95e4a1582f25#comments</comments>
      <guid>9559bc54-b9b2-8c97-4a5d-95e4a1582f25</guid>
      <pubDate>Mon, 16 Dec 2019 17:40:38 GMT</pubDate>
    </item>
    <item>
      <title>Periodic table, period 1 to 4 without symbols (difficult)</title>
      <link>https://naturalsciences.didactalia.net/resource/periodic-table-period-1-to-4-without-symbols/a4af4125-bd2a-f282-c45d-98ffeca0e67b</link>
      <description>&lt;img style="margin:15px" align="left" height="54" width="71" alt="Periodic table, period 1 to 4 without symbols (difficult)" src="https://content.gnoss.ws/imagenes/Documentos/imgsem/a4/a4af/a4af4125-bd2a-f282-c45d-98ffeca0e67b/3b70bf29-00a0-baaa-bd9c-be890adbff12_240.png"/&gt;&lt;p&gt;In the periodic table of the elements, each row of the table is called the period. The number of levels an atom has determines the period to which it belongs. The first period has only two elements, the second and third periods have eight elements each and the fourth is eighteen.&lt;/p&gt;

&lt;p&gt;The &lt;strong&gt;periodic table of the elements&lt;/strong&gt; is the way proposed by &lt;strong&gt;&lt;a href="https://es.wikipedia.org/wiki/Dmitri_Mendel%C3%A9yev" target="_blank"&gt;Dmitri Mendeléyev&lt;/a&gt;&lt;/strong&gt; in 1869 to arrange the chemical elements, which are ordered by their atomic number, their electron configuration and their chemical properties. Since its first appearance, this table has been increasing with the discovery of new chemical elements, some present in nature and others originated by man.&lt;/p&gt;

&lt;p&gt;Enlarge or reduce the image with zoom and adjust its size to the screen of your device. You can also click on the image and drag it to center it.&lt;/p&gt;&lt;p&gt;Tags: &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/elemento químico"&gt;elemento químico&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/número atómico"&gt;número atómico&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/configuración electrónica"&gt;configuración electrónica&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/propiedad química"&gt;propiedad química&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/dmitri mendeléyev"&gt;dmitri mendeléyev&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/tabla periódica"&gt;tabla periódica&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/tabla periódica de los elementos"&gt;tabla periódica de los elementos&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/elementos del periodo 1"&gt;elementos del periodo 1&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/elementos del periodo 2"&gt;elementos del periodo 2&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/elementos del periodo 3"&gt;elementos del periodo 3&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/hidrógeno"&gt;hidrógeno&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/litio"&gt;litio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/sodio"&gt;sodio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/magnesio"&gt;magnesio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/berilio"&gt;berilio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/aluminio"&gt;aluminio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/boro"&gt;boro&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/silicio"&gt;silicio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/carbono"&gt;carbono&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/fósforo"&gt;fósforo&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/nitrógeno"&gt;nitrógeno&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/azufre"&gt;azufre&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/oxígeno"&gt;oxígeno&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/cloro"&gt;cloro&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/flúor"&gt;flúor&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/argón"&gt;argón&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/neón"&gt;neón&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/helio"&gt;helio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/potasio"&gt;potasio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/calcio"&gt;calcio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/escandio"&gt;escandio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/titanio"&gt;titanio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/vanadio"&gt;vanadio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/cromo"&gt;cromo&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/manganeso"&gt;manganeso&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/hierro"&gt;hierro&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/cobalto"&gt;cobalto&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/níquel"&gt;níquel&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/cobre"&gt;cobre&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/zinc"&gt;zinc&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/galio"&gt;galio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/germanio"&gt;germanio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/arsénico"&gt;arsénico&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/selenio"&gt;selenio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/bromo"&gt;bromo&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/kriptón"&gt;kriptón&lt;/a&gt;&lt;/p&gt;</description>
      <category>Tabla periódica</category>
      <comments>https://naturalsciences.didactalia.net/resource/periodic-table-period-1-to-4-without-symbols/a4af4125-bd2a-f282-c45d-98ffeca0e67b#comments</comments>
      <guid>a4af4125-bd2a-f282-c45d-98ffeca0e67b</guid>
      <pubDate>Mon, 16 Dec 2019 17:31:41 GMT</pubDate>
    </item>
    <item>
      <title>Periodic table, periods 4 and 5 with symbols (difficult)</title>
      <link>https://naturalsciences.didactalia.net/resource/periodic-table-periods-4-and-5-with-symbols/0a88d82e-5a4a-0a49-fe91-5af283bb9e51</link>
      <description>&lt;img style="margin:15px" align="left" height="54" width="71" alt="Periodic table, periods 4 and 5 with symbols (difficult)" src="https://content.gnoss.ws/imagenes/Documentos/imgsem/0a/0a88/0a88d82e-5a4a-0a49-fe91-5af283bb9e51/aa374cb2-f097-dcd2-d2ae-1cfe09eb576b_240.png"/&gt;&lt;p&gt;In the periodic table of the elements, each row of the table is called the period. The number of levels an atom has determines the period to which it belongs. The fourth and fifth periods are eighteen each.&lt;/p&gt;

&lt;p&gt;The &lt;strong&gt;periodic table of the elements&lt;/strong&gt; is the way proposed by &lt;strong&gt;&lt;a href="https://es.wikipedia.org/wiki/Dmitri_Mendel%C3%A9yev" target="_blank"&gt;Dmitri Mendeléyev&lt;/a&gt;&lt;/strong&gt; in 1869 to arrange the chemical elements, which are ordered by their atomic number, their electron configuration and their chemical properties. Since its first appearance, this table has been increasing with the discovery of new chemical elements, some present in nature and others originated by man.&lt;/p&gt;

&lt;p&gt;Enlarge or reduce the image with zoom and adjust its size to the screen of your device. You can also click on the image and drag it to center it.&lt;/p&gt;&lt;p&gt;Tags: &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/elemento químico"&gt;elemento químico&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/número atómico"&gt;número atómico&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/configuración electrónica"&gt;configuración electrónica&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/propiedad química"&gt;propiedad química&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/dmitri mendeléyev"&gt;dmitri mendeléyev&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/tabla periódica"&gt;tabla periódica&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/tabla periódica de los elementos"&gt;tabla periódica de los elementos&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/elementos del periodo 4"&gt;elementos del periodo 4&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/elementos del periodo 5"&gt;elementos del periodo 5&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/potasio"&gt;potasio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/rubidio"&gt;rubidio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/calcio"&gt;calcio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/estroncio"&gt;estroncio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/itrio"&gt;itrio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/escandio"&gt;escandio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/titanio"&gt;titanio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/circonio"&gt;circonio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/niobio"&gt;niobio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/vanadio"&gt;vanadio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/cromo"&gt;cromo&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/molibdeno"&gt;molibdeno&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/tecnecio"&gt;tecnecio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/manganeso"&gt;manganeso&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/hierro"&gt;hierro&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/rutenio"&gt;rutenio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/rodio"&gt;rodio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/cobalto"&gt;cobalto&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/níquel"&gt;níquel&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/paladio"&gt;paladio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/plata"&gt;plata&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/cobre"&gt;cobre&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/zinc"&gt;zinc&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/cadmio"&gt;cadmio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/indio"&gt;indio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/galio"&gt;galio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/germanio"&gt;germanio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/estaño"&gt;estaño&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/antimonio"&gt;antimonio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/arsénico"&gt;arsénico&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/selenio"&gt;selenio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/telurio"&gt;telurio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/yodo"&gt;yodo&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/bromo"&gt;bromo&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/kriptón"&gt;kriptón&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/xenón"&gt;xenón&lt;/a&gt;&lt;/p&gt;</description>
      <author>didactalia</author>
      <category>Tabla periódica</category>
      <comments>https://naturalsciences.didactalia.net/resource/periodic-table-periods-4-and-5-with-symbols/0a88d82e-5a4a-0a49-fe91-5af283bb9e51#comments</comments>
      <guid>0a88d82e-5a4a-0a49-fe91-5af283bb9e51</guid>
      <pubDate>Mon, 16 Dec 2019 16:46:45 GMT</pubDate>
    </item>
    <item>
      <title>Periodic table, periods 1 to 4 with symbols (difficult)</title>
      <link>https://naturalsciences.didactalia.net/resource/periodic-table-periods-1-to-4-with-symbols/85f25ff6-04a6-5633-6be1-60605a0181ef</link>
      <description>&lt;img style="margin:15px" align="left" height="54" width="71" alt="Periodic table, periods 1 to 4 with symbols (difficult)" src="https://content.gnoss.ws/imagenes/Documentos/imgsem/85/85f2/85f25ff6-04a6-5633-6be1-60605a0181ef/a90260e3-51e6-9b86-2366-1b09e68fefab_240.png"/&gt;&lt;p&gt;In the periodic table of the elements, each row of the table is called the period. The number of levels an atom has determines the period to which it belongs. The first period has only two elements, the second and third periods have eight elements each and the fourth is eighteen.&lt;/p&gt;

&lt;p&gt;The &lt;strong&gt;periodic table of the elements&lt;/strong&gt; is the way proposed by &lt;strong&gt;&lt;a href="https://es.wikipedia.org/wiki/Dmitri_Mendel%C3%A9yev" target="_blank"&gt;Dmitri Mendeléyev&lt;/a&gt;&lt;/strong&gt; in 1869 to arrange the chemical elements, which are ordered by their atomic number, their electron configuration and their chemical properties. Since its first appearance, this table has been increasing with the discovery of new chemical elements, some present in nature and others originated by man.&lt;/p&gt;

&lt;p&gt;Enlarge or reduce the image with zoom and adjust its size to the screen of your device. You can also click on the image and drag it to center it.&lt;/p&gt;&lt;p&gt;Tags: &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/elemento químico"&gt;elemento químico&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/número atómico"&gt;número atómico&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/configuración electrónica"&gt;configuración electrónica&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/propiedad química"&gt;propiedad química&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/dmitri mendeléyev"&gt;dmitri mendeléyev&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/tabla periódica"&gt;tabla periódica&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/tabla periódica de los elementos"&gt;tabla periódica de los elementos&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/elementos del periodo 1"&gt;elementos del periodo 1&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/elementos del periodo 2"&gt;elementos del periodo 2&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/elementos del periodo 3"&gt;elementos del periodo 3&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/hidrógeno"&gt;hidrógeno&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/litio"&gt;litio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/sodio"&gt;sodio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/magnesio"&gt;magnesio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/berilio"&gt;berilio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/aluminio"&gt;aluminio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/boro"&gt;boro&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/silicio"&gt;silicio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/carbono"&gt;carbono&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/fósforo"&gt;fósforo&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/nitrógeno"&gt;nitrógeno&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/azufre"&gt;azufre&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/oxígeno"&gt;oxígeno&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/cloro"&gt;cloro&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/flúor"&gt;flúor&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/argón"&gt;argón&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/neón"&gt;neón&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/helio"&gt;helio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/potasio"&gt;potasio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/calcio"&gt;calcio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/escandio"&gt;escandio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/titanio"&gt;titanio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/vanadio"&gt;vanadio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/cromo"&gt;cromo&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/manganeso"&gt;manganeso&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/hierro"&gt;hierro&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/cobalto"&gt;cobalto&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/níquel"&gt;níquel&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/cobre"&gt;cobre&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/zinc"&gt;zinc&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/galio"&gt;galio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/germanio"&gt;germanio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/arsénico"&gt;arsénico&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/selenio"&gt;selenio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/bromo"&gt;bromo&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/kriptón"&gt;kriptón&lt;/a&gt;&lt;/p&gt;</description>
      <author>didactalia</author>
      <category>Tabla periódica</category>
      <comments>https://naturalsciences.didactalia.net/resource/periodic-table-periods-1-to-4-with-symbols/85f25ff6-04a6-5633-6be1-60605a0181ef#comments</comments>
      <guid>85f25ff6-04a6-5633-6be1-60605a0181ef</guid>
      <pubDate>Mon, 16 Dec 2019 16:48:35 GMT</pubDate>
    </item>
    <item>
      <title>Periodic table with symbols (difficult)</title>
      <link>https://naturalsciences.didactalia.net/resource/periodic-table-with-symbols-difficult/b98cacb6-78b8-79b7-2ad6-7076ff11a779</link>
      <description>&lt;img style="margin:15px" align="left" height="54" width="71" alt="Periodic table with symbols (difficult)" src="https://content.gnoss.ws/imagenes/Documentos/imgsem/b9/b98c/b98cacb6-78b8-79b7-2ad6-7076ff11a779/1bbcd64c-9bf6-d722-201c-cffa0f332c68_240.png"/&gt;&lt;p&gt;The periodic table of the elements is the way proposed by &lt;a href="https://es.wikipedia.org/wiki/Dmitri_Mendel%C3%A9yev" target="_blank"&gt;Dmitri Mendeléyev&lt;/a&gt; in 1869 to arrange the chemical elements, which are ordered by their atomic number, their electron configuration and their chemical properties. Since its first appearance, this table has been increasing with the discovery of new chemical elements, some present in nature and others originated by humans.&lt;/p&gt;&lt;p&gt;Learn the elements of the periodic table with this interactive game and place them in the appropriate place.&lt;/p&gt;&lt;p&gt;Enlarge or reduce the image with zoom and adjust its size to the screen of your device. You can also click on the image and drag it to center it.&lt;/p&gt;&lt;p&gt;Tags: &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/elemento químico"&gt;elemento químico&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/número atómico"&gt;número atómico&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/configuración electrónica"&gt;configuración electrónica&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/propiedad química"&gt;propiedad química&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/dmitri mendeléyev"&gt;dmitri mendeléyev&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/tabla periódica"&gt;tabla periódica&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/tabla periódica de los elementos"&gt;tabla periódica de los elementos&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/alcalinos"&gt;alcalinos&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/gases nobles"&gt;gases nobles&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/halógenos"&gt;halógenos&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/metales de transición"&gt;metales de transición&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/metaloides"&gt;metaloides&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/no metales"&gt;no metales&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/otros metales"&gt;otros metales&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/actínidos"&gt;actínidos&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/lantánidos"&gt;lantánidos&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/juego de química"&gt;juego de química&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/juego de la tabla periódica"&gt;juego de la tabla periódica&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/cesio"&gt;cesio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/calcio"&gt;calcio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/californio"&gt;californio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/carbono"&gt;carbono&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/cerio"&gt;cerio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/cloro"&gt;cloro&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/cromo"&gt;cromo&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/cobalto"&gt;cobalto&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/copernicio"&gt;copernicio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/cobre"&gt;cobre&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/curio"&gt;curio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/darmstadtio"&gt;darmstadtio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/dubnio"&gt;dubnio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/disprosio"&gt;disprosio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/einsteinio"&gt;einsteinio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/erbio"&gt;erbio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/europio"&gt;europio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/fermio"&gt;fermio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/flerovio"&gt;flerovio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/flúor"&gt;flúor&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/francio"&gt;francio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/gadolinio"&gt;gadolinio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/galio"&gt;galio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/germanio"&gt;germanio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/hafnio"&gt;hafnio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/hassio"&gt;hassio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/helio"&gt;helio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/holmio"&gt;holmio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/hidrógeno"&gt;hidrógeno&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/indio"&gt;indio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/yodo"&gt;yodo&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/iridio"&gt;iridio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/hierro"&gt;hierro&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/criptón"&gt;criptón&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/lantano"&gt;lantano&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/lawrencio"&gt;lawrencio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/plomo"&gt;plomo&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/litio"&gt;litio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/lutecio"&gt;lutecio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/magnesio"&gt;magnesio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/manganeso"&gt;manganeso&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/meitnerio"&gt;meitnerio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/mendelevio"&gt;mendelevio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/mercurio"&gt;mercurio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/molibdeno"&gt;molibdeno&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/moscovio"&gt;moscovio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/neodimio"&gt;neodimio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/níquel"&gt;níquel&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/nihonio"&gt;nihonio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/niobio"&gt;niobio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/nitrógeno"&gt;nitrógeno&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/nobelio"&gt;nobelio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/oganesson"&gt;oganesson&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/osmio"&gt;osmio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/oxígeno"&gt;oxígeno&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/paladio"&gt;paladio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/fósforo"&gt;fósforo&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/platino"&gt;platino&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/plutonio"&gt;plutonio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/polonio"&gt;polonio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/potasio"&gt;potasio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/praseodimio"&gt;praseodimio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/prometio"&gt;prometio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/protactinio"&gt;protactinio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/radio"&gt;radio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/radón"&gt;radón&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/renio"&gt;renio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/rodio"&gt;rodio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/roentgenio"&gt;roentgenio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/rubidio"&gt;rubidio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/rubidio rutenio"&gt;rubidio rutenio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/samario"&gt;samario&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/escandio"&gt;escandio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/seaborgium"&gt;seaborgium&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/selenio"&gt;selenio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/silicio"&gt;silicio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/plata"&gt;plata&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/sodio"&gt;sodio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/estroncio"&gt;estroncio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/azufre"&gt;azufre&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/tantalio"&gt;tantalio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/tecnecio"&gt;tecnecio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/telurio"&gt;telurio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/terbio"&gt;terbio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/torio"&gt;torio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/tulio"&gt;tulio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/estaño"&gt;estaño&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/titanio"&gt;titanio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/tungsteno"&gt;tungsteno&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/uranio"&gt;uranio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/vanadio"&gt;vanadio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/xenón"&gt;xenón&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/zinc"&gt;zinc&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/circonio"&gt;circonio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/ytterbio"&gt;ytterbio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/itrio"&gt;itrio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/neptunio"&gt;neptunio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/livermorio"&gt;livermorio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/teneso"&gt;teneso&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/aluminio"&gt;aluminio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/americio"&gt;americio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/antimonio"&gt;antimonio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/argón"&gt;argón&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/arsénico"&gt;arsénico&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/bario"&gt;bario&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/berkelio"&gt;berkelio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/berilio"&gt;berilio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/bismuto"&gt;bismuto&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/bohrio"&gt;bohrio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/boro"&gt;boro&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/bromo"&gt;bromo&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/cadmio"&gt;cadmio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/ástato"&gt;ástato&lt;/a&gt;&lt;/p&gt;</description>
      <author>didactalia</author>
      <category>Tabla periódica</category>
      <comments>https://naturalsciences.didactalia.net/resource/periodic-table-with-symbols-difficult/b98cacb6-78b8-79b7-2ad6-7076ff11a779#comments</comments>
      <guid>b98cacb6-78b8-79b7-2ad6-7076ff11a779</guid>
      <pubDate>Wed, 18 Dec 2019 09:43:55 GMT</pubDate>
    </item>
    <item>
      <title>Periodic table, periods 4 and 5 with symbols (difficult)</title>
      <link>https://naturalsciences.didactalia.net/resource/periodic-table-periods-4-and-5-with-symbols/73d4f48a-3bf5-0c57-12f7-9c2f314d0ad2</link>
      <description>&lt;img style="margin:15px" align="left" height="54" width="71" alt="Periodic table, periods 4 and 5 with symbols (difficult)" src="https://content.gnoss.ws/imagenes/Documentos/imgsem/73/73d4/73d4f48a-3bf5-0c57-12f7-9c2f314d0ad2/f8a19261-d983-c35e-1fa5-9a0ebb963f03_240.png"/&gt;&lt;p&gt;In the periodic table of the elements, each row of the table is called the period. The number of levels an atom has determines the period to which it belongs. The fourth and fifth periods are eighteen each.&lt;/p&gt;

&lt;p&gt;The &lt;strong&gt;periodic table of the elements&lt;/strong&gt; is the way proposed by &lt;strong&gt;&lt;a href="https://es.wikipedia.org/wiki/Dmitri_Mendel%C3%A9yev" target="_blank"&gt;Dmitri Mendeléyev&lt;/a&gt;&lt;/strong&gt; in 1869 to arrange the chemical elements, which are ordered by their atomic number, their electron configuration and their chemical properties. Since its first appearance, this table has been increasing with the discovery of new chemical elements, some present in nature and others originated by man.&lt;/p&gt;

&lt;p&gt;Enlarge or reduce the image with zoom and adjust its size to the screen of your device. You can also click on the image and drag it to center it.&lt;/p&gt;&lt;p&gt;Tags: &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/elemento químico"&gt;elemento químico&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/número atómico"&gt;número atómico&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/configuración electrónica"&gt;configuración electrónica&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/propiedad química"&gt;propiedad química&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/dmitri mendeléyev"&gt;dmitri mendeléyev&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/tabla periódica"&gt;tabla periódica&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/tabla periódica de los elementos"&gt;tabla periódica de los elementos&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/elementos del periodo 4"&gt;elementos del periodo 4&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/elementos del periodo 5"&gt;elementos del periodo 5&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/potasio"&gt;potasio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/rubidio"&gt;rubidio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/calcio"&gt;calcio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/estroncio"&gt;estroncio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/itrio"&gt;itrio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/escandio"&gt;escandio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/titanio"&gt;titanio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/circonio"&gt;circonio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/niobio"&gt;niobio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/vanadio"&gt;vanadio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/cromo"&gt;cromo&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/molibdeno"&gt;molibdeno&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/tecnecio"&gt;tecnecio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/manganeso"&gt;manganeso&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/hierro"&gt;hierro&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/rutenio"&gt;rutenio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/rodio"&gt;rodio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/cobalto"&gt;cobalto&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/níquel"&gt;níquel&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/paladio"&gt;paladio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/plata"&gt;plata&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/cobre"&gt;cobre&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/zinc"&gt;zinc&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/cadmio"&gt;cadmio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/indio"&gt;indio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/galio"&gt;galio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/germanio"&gt;germanio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/estaño"&gt;estaño&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/antimonio"&gt;antimonio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/arsénico"&gt;arsénico&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/selenio"&gt;selenio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/telurio"&gt;telurio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/yodo"&gt;yodo&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/bromo"&gt;bromo&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/kriptón"&gt;kriptón&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/games/tag/xenón"&gt;xenón&lt;/a&gt;&lt;/p&gt;</description>
      <author>didactalia</author>
      <category>Tabla periódica</category>
      <comments>https://naturalsciences.didactalia.net/resource/periodic-table-periods-4-and-5-with-symbols/73d4f48a-3bf5-0c57-12f7-9c2f314d0ad2#comments</comments>
      <guid>73d4f48a-3bf5-0c57-12f7-9c2f314d0ad2</guid>
      <pubDate>Mon, 16 Dec 2019 16:47:01 GMT</pubDate>
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