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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/category/periodic-table/2fa4bfde-e7d5-45ec-bf3d-f24e95700620?rss&amp;pagina=6</link>
    <description>Natural Science Games. Play to learn the bones, muscles and systems of the human body, and other Natural Science items.
</description>
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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>
      <url>https://content.gnoss.ws/imagenes/proyectos/0f6affc3-198e-412c-a3dc-efd88216b4d9.png</url>
      <link>https://naturalsciences.didactalia.net/category/periodic-table/2fa4bfde-e7d5-45ec-bf3d-f24e95700620?rss&amp;pagina=6</link>
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    <item>
      <title>Periodic table, noble gas group (difficult)</title>
      <link>https://naturalsciences.didactalia.net/resource/periodic-table-noble-gas-group-difficult/7cce127b-40e6-8416-d89b-f7fbabcf305e</link>
      <description>&lt;img style="margin:15px" align="left" height="54" width="71" alt="Periodic table, noble gas group (difficult)" src="https://content.gnoss.ws/imagenes/Documentos/imgsem/7c/7cce/7cce127b-40e6-8416-d89b-f7fbabcf305e/3f80e4db-6b94-82d5-febe-540919abefd3_240.png"/&gt;&lt;p&gt;The noble gases are a group of monoatomic, odorless, colorless chemical elements and have a very low chemical reactivity. &lt;a href="https://es.wikipedia.org/wiki/Pierre_Janssen" target="_blank" title="Pierre Janssen"&gt;Pierre Janssen&lt;/a&gt; and &lt;a href="https://es.wikipedia.org/wiki/Joseph_Norman_Lockyer" target="_blank" title="Joseph Norman Lockyer"&gt;Joseph Norman Lockyer&lt;/a&gt; were the first to discover, in the 19th century, a noble gas which they called helium when they examined the chromosphere of the Sun, called in Greek ἥλιος (helios).&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/search/tag/elemento químico"&gt;elemento químico&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/número atómico"&gt;número atómico&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/configuración electrónica"&gt;configuración electrónica&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/propiedad química"&gt;propiedad química&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/dmitri mendeléyev"&gt;dmitri mendeléyev&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/tabla periódica"&gt;tabla periódica&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/tabla periódica de los elementos"&gt;tabla periódica de los elementos&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/helio"&gt;helio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/neón"&gt;neón&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/argón"&gt;argón&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/kriptón"&gt;kriptón&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/xenón"&gt;xenón&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/radón"&gt;radón&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/oganesón"&gt;oganesón&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/joseph norman lockyer"&gt;joseph norman lockyer&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/pierre janssen"&gt;pierre janssen&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/gases nobles"&gt;gases nobles&lt;/a&gt;&lt;/p&gt;</description>
      <author>didactalia</author>
      <category>Tabla periódica</category>
      <comments>https://naturalsciences.didactalia.net/resource/periodic-table-noble-gas-group-difficult/7cce127b-40e6-8416-d89b-f7fbabcf305e#comments</comments>
      <guid>7cce127b-40e6-8416-d89b-f7fbabcf305e</guid>
      <pubDate>Mon, 16 Dec 2019 17:02:30 GMT</pubDate>
    </item>
    <item>
      <title>Periodic table, noble gas group (difficult)</title>
      <link>https://naturalsciences.didactalia.net/resource/periodic-table-noble-gas-group-difficult/9aed423c-c048-e7e6-0f57-46dcd41c991f</link>
      <description>&lt;img style="margin:15px" align="left" height="54" width="71" alt="Periodic table, noble gas group (difficult)" src="https://content.gnoss.ws/imagenes/Documentos/imgsem/9a/9aed/9aed423c-c048-e7e6-0f57-46dcd41c991f/050002da-c420-c67b-fc0e-e110c7f956f3_240.png"/&gt;&lt;p&gt;The noble gases are a group of monoatomic, odorless, colorless chemical elements and have a very low chemical reactivity. &lt;a href="https://es.wikipedia.org/wiki/Pierre_Janssen" target="_blank" title="Pierre Janssen"&gt;Pierre Janssen&lt;/a&gt; and &lt;a href="https://es.wikipedia.org/wiki/Joseph_Norman_Lockyer" target="_blank" title="Joseph Norman Lockyer"&gt;Joseph Norman Lockyer&lt;/a&gt; were the first to discover, in the 19th century, a noble gas which they called helium when they examined the chromosphere of the Sun, called in Greek ἥλιος (helios).&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/search/tag/elemento químico"&gt;elemento químico&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/número atómico"&gt;número atómico&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/configuración electrónica"&gt;configuración electrónica&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/propiedad química"&gt;propiedad química&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/dmitri mendeléyev"&gt;dmitri mendeléyev&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/tabla periódica"&gt;tabla periódica&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/tabla periódica de los elementos"&gt;tabla periódica de los elementos&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/helio"&gt;helio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/neón"&gt;neón&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/argón"&gt;argón&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/kriptón"&gt;kriptón&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/xenón"&gt;xenón&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/radón"&gt;radón&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/oganesón"&gt;oganesón&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/joseph norman lockyer"&gt;joseph norman lockyer&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/pierre janssen"&gt;pierre janssen&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/gases nobles"&gt;gases nobles&lt;/a&gt;&lt;/p&gt;</description>
      <author>didactalia</author>
      <category>Tabla periódica</category>
      <comments>https://naturalsciences.didactalia.net/resource/periodic-table-noble-gas-group-difficult/9aed423c-c048-e7e6-0f57-46dcd41c991f#comments</comments>
      <guid>9aed423c-c048-e7e6-0f57-46dcd41c991f</guid>
      <pubDate>Mon, 16 Dec 2019 17:02:13 GMT</pubDate>
    </item>
    <item>
      <title>Periodic table, halogen group with symbols (difficult)</title>
      <link>https://naturalsciences.didactalia.net/resource/periodic-table-halogen-group-with-symbols/9d7252f3-e828-a1ea-93ff-712e8188c477</link>
      <description>&lt;img style="margin:15px" align="left" height="54" width="71" alt="Periodic table, halogen group with symbols (difficult)" src="https://content.gnoss.ws/imagenes/Documentos/imgsem/9d/9d72/9d7252f3-e828-a1ea-93ff-712e8188c477/ca5a4752-281d-f1ff-6a06-19102454ae4f_240.png"/&gt;&lt;p&gt;&lt;strong&gt;Halogens&lt;/strong&gt; (from the Greek, salt-forming) are very useful elements since, as the name implies, they form salts when they react with metals. Without the halogens we would not have sodium chloride, better known as common salt. Some of the halogens, such as chlorine, iodine or bromine are used as disinfectants. However, it is necessary to be careful with them since, in their untreated form, they can be fatally toxic.&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;Learn what are the lanthanides with this interactive game and place them in the right 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/search/tag/elemento químico"&gt;elemento químico&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/número atómico"&gt;número atómico&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/configuración electrónica"&gt;configuración electrónica&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/propiedad química"&gt;propiedad química&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/dmitri mendeléyev"&gt;dmitri mendeléyev&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/tabla periódica"&gt;tabla periódica&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/tabla periódica de los elementos"&gt;tabla periódica de los elementos&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/flúor"&gt;flúor&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/cloro"&gt;cloro&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/bromo"&gt;bromo&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/yodo"&gt;yodo&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/astato"&gt;astato&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/teneso"&gt;teneso&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/halógenos"&gt;halógenos&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/grupo halógenos"&gt;grupo halógenos&lt;/a&gt;&lt;/p&gt;</description>
      <author>didactalia</author>
      <category>Tabla periódica</category>
      <comments>https://naturalsciences.didactalia.net/resource/periodic-table-halogen-group-with-symbols/9d7252f3-e828-a1ea-93ff-712e8188c477#comments</comments>
      <guid>9d7252f3-e828-a1ea-93ff-712e8188c477</guid>
      <pubDate>Mon, 16 Dec 2019 17:01:11 GMT</pubDate>
    </item>
    <item>
      <title>Periodic table, halogen group with symbols (difficult)</title>
      <link>https://naturalsciences.didactalia.net/resource/periodic-table-halogen-group-with-symbols/bcfc9cf1-cda0-5117-06ef-259f567e4463</link>
      <description>&lt;img style="margin:15px" align="left" height="54" width="71" alt="Periodic table, halogen group with symbols (difficult)" src="https://content.gnoss.ws/imagenes/Documentos/imgsem/bc/bcfc/bcfc9cf1-cda0-5117-06ef-259f567e4463/7d9a76b2-a2cd-9591-7a74-def3ab2bb0df_240.png"/&gt;&lt;p&gt;&lt;strong&gt;Halogens&lt;/strong&gt; (from the Greek, salt-forming) are very useful elements since, as the name implies, they form salts when they react with metals. Without the halogens we would not have sodium chloride, better known as common salt. Some of the halogens, such as chlorine, iodine or bromine are used as disinfectants. However, it is necessary to be careful with them since, in their untreated form, they can be fatally toxic.&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;Learn what are the lanthanides with this interactive game and place them in the right 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/search/tag/elemento químico"&gt;elemento químico&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/número atómico"&gt;número atómico&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/configuración electrónica"&gt;configuración electrónica&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/propiedad química"&gt;propiedad química&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/dmitri mendeléyev"&gt;dmitri mendeléyev&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/tabla periódica"&gt;tabla periódica&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/tabla periódica de los elementos"&gt;tabla periódica de los elementos&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/flúor"&gt;flúor&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/cloro"&gt;cloro&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/bromo"&gt;bromo&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/yodo"&gt;yodo&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/astato"&gt;astato&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/teneso"&gt;teneso&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/halógenos"&gt;halógenos&lt;/a&gt;&lt;/p&gt;</description>
      <author>didactalia</author>
      <category>Tabla periódica</category>
      <comments>https://naturalsciences.didactalia.net/resource/periodic-table-halogen-group-with-symbols/bcfc9cf1-cda0-5117-06ef-259f567e4463#comments</comments>
      <guid>bcfc9cf1-cda0-5117-06ef-259f567e4463</guid>
      <pubDate>Mon, 16 Dec 2019 17:00:50 GMT</pubDate>
    </item>
    <item>
      <title>Periodic table, lanthanide group with symbols (difficult)</title>
      <link>https://naturalsciences.didactalia.net/resource/periodic-table-lanthanide-group-with-symbols/24897f0c-3cc1-6df6-1551-62636533150c</link>
      <description>&lt;img style="margin:15px" align="left" height="54" width="71" alt="Periodic table, lanthanide group with symbols (difficult)" src="https://content.gnoss.ws/imagenes/Documentos/imgsem/24/2489/24897f0c-3cc1-6df6-1551-62636533150c/63f8ab22-014f-3365-bc1d-f454f11acf0c_240.png"/&gt;&lt;p&gt;Lanthanides are a group of elements also called "rare earths" because they are in the form of oxides. They form the "internal transition elements" next to the actinides, with which they share space in the two rows of elements located under the periodic table.&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/search/tag/elemento químico"&gt;elemento químico&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/número atómico"&gt;número atómico&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/configuración electrónica"&gt;configuración electrónica&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/propiedad química"&gt;propiedad química&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/dmitri mendeléyev"&gt;dmitri mendeléyev&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/tabla periódica"&gt;tabla periódica&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/tabla periódica de los elementos"&gt;tabla periódica de los elementos&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/lutecio"&gt;lutecio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/gadolinio"&gt;gadolinio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/terbio"&gt;terbio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/disprosio"&gt;disprosio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/holmio"&gt;holmio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/tulio"&gt;tulio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/iterbio"&gt;iterbio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/prometio"&gt;prometio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/samario"&gt;samario&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/europio"&gt;europio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/praseodimio"&gt;praseodimio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/neodimio"&gt;neodimio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/lantano"&gt;lantano&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/cerio"&gt;cerio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/lantánidos"&gt;lantánidos&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/elementos de transición interna"&gt;elementos de transición interna&lt;/a&gt;&lt;/p&gt;</description>
      <author>didactalia</author>
      <category>Tabla periódica</category>
      <comments>https://naturalsciences.didactalia.net/resource/periodic-table-lanthanide-group-with-symbols/24897f0c-3cc1-6df6-1551-62636533150c#comments</comments>
      <guid>24897f0c-3cc1-6df6-1551-62636533150c</guid>
      <pubDate>Mon, 16 Dec 2019 16:59:51 GMT</pubDate>
    </item>
    <item>
      <title>Periodic table, lanthanide group with symbols (difficult)</title>
      <link>https://naturalsciences.didactalia.net/resource/periodic-table-lanthanide-group-with-symbols/fcffc4d9-9653-07c8-2dc8-4924d5fdbdbb</link>
      <description>&lt;img style="margin:15px" align="left" height="54" width="71" alt="Periodic table, lanthanide group with symbols (difficult)" src="https://content.gnoss.ws/imagenes/Documentos/imgsem/fc/fcff/fcffc4d9-9653-07c8-2dc8-4924d5fdbdbb/9ddd74ba-b037-34b7-342b-8e610c9c879a_240.png"/&gt;&lt;p&gt;Lanthanides are a group of elements also called "rare earths" because they are in the form of oxides. They form the "internal transition elements" next to the actinides, with which they share space in the two rows of elements located under the periodic table.&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/search/tag/elemento químico"&gt;elemento químico&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/número atómico"&gt;número atómico&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/configuración electrónica"&gt;configuración electrónica&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/propiedad química"&gt;propiedad química&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/dmitri mendeléyev"&gt;dmitri mendeléyev&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/tabla periódica"&gt;tabla periódica&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/tabla periódica de los elementos"&gt;tabla periódica de los elementos&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/lutecio"&gt;lutecio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/gadolinio"&gt;gadolinio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/terbio"&gt;terbio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/disprosio"&gt;disprosio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/holmio"&gt;holmio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/tulio"&gt;tulio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/iterbio"&gt;iterbio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/prometio"&gt;prometio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/samario"&gt;samario&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/europio"&gt;europio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/praseodimio"&gt;praseodimio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/neodimio"&gt;neodimio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/lantano"&gt;lantano&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/cerio"&gt;cerio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/lantánidos"&gt;lantánidos&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/elementos de transición interna"&gt;elementos de transición interna&lt;/a&gt;&lt;/p&gt;</description>
      <author>didactalia</author>
      <category>Tabla periódica</category>
      <comments>https://naturalsciences.didactalia.net/resource/periodic-table-lanthanide-group-with-symbols/fcffc4d9-9653-07c8-2dc8-4924d5fdbdbb#comments</comments>
      <guid>fcffc4d9-9653-07c8-2dc8-4924d5fdbdbb</guid>
      <pubDate>Mon, 16 Dec 2019 16:59:36 GMT</pubDate>
    </item>
    <item>
      <title>Periodic table, transition metal group with symbols (difficult)</title>
      <link>https://naturalsciences.didactalia.net/resource/periodic-table-transition-metal-group-with/b6d60c4c-b3e7-477c-ff96-5f2f095c5f96</link>
      <description>&lt;img style="margin:15px" align="left" height="54" width="71" alt="Periodic table, transition metal group with symbols (difficult)" src="https://content.gnoss.ws/imagenes/Documentos/imgsem/b6/b6d6/b6d60c4c-b3e7-477c-ff96-5f2f095c5f96/5082c920-e011-6bd1-fbe6-f4811404f4e3_240.png"/&gt;&lt;p&gt;The transition metals are located in the central part of the periodic table. The name "transition" comes from a characteristic that these elements have to be able to be stable by themselves without the need for a reaction with another element. Almost all the elements are typical metals, of high hardness, with high melting and boiling points, in addition to being good conductors of both heat and electricity.&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/search/tag/elemento químico"&gt;elemento químico&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/número atómico"&gt;número atómico&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/configuración electrónica"&gt;configuración electrónica&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/propiedad química"&gt;propiedad química&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/dmitri mendeléyev"&gt;dmitri mendeléyev&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/tabla periódica"&gt;tabla periódica&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/tabla periódica de los elementos"&gt;tabla periódica de los elementos&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/escandio"&gt;escandio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/itrio"&gt;itrio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/lutecio"&gt;lutecio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/lawrencio"&gt;lawrencio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/titanio"&gt;titanio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/circonio"&gt;circonio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/hafnio"&gt;hafnio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/rutherfodio"&gt;rutherfodio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/vanadio"&gt;vanadio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/niobio"&gt;niobio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/tantalio"&gt;tantalio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/subnio"&gt;subnio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/seaborgio"&gt;seaborgio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/molibdeno"&gt;molibdeno&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/wolframio"&gt;wolframio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/cromo"&gt;cromo&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/manganeso"&gt;manganeso&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/tecnecio"&gt;tecnecio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/renio"&gt;renio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/bohrio"&gt;bohrio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/hasio"&gt;hasio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/osmio"&gt;osmio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/rutenio"&gt;rutenio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/hierro"&gt;hierro&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/cobalto"&gt;cobalto&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/rodio"&gt;rodio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/iridio"&gt;iridio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/meitnerio"&gt;meitnerio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/darmstatio"&gt;darmstatio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/platino"&gt;platino&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/paladio"&gt;paladio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/níquel"&gt;níquel&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/cobre"&gt;cobre&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/plata"&gt;plata&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/oro"&gt;oro&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/roentgenio"&gt;roentgenio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/copernicio"&gt;copernicio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/mercurio"&gt;mercurio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/cadmio"&gt;cadmio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/zinc"&gt;zinc&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/metales de transición"&gt;metales de transición&lt;/a&gt;&lt;/p&gt;</description>
      <author>didactalia</author>
      <category>Tabla periódica</category>
      <comments>https://naturalsciences.didactalia.net/resource/periodic-table-transition-metal-group-with/b6d60c4c-b3e7-477c-ff96-5f2f095c5f96#comments</comments>
      <guid>b6d60c4c-b3e7-477c-ff96-5f2f095c5f96</guid>
      <pubDate>Mon, 16 Dec 2019 16:58:41 GMT</pubDate>
    </item>
    <item>
      <title>Periodic table, transition metal group with symbols (difficult)</title>
      <link>https://naturalsciences.didactalia.net/resource/periodic-table-transition-metal-group-with/c104e602-ec56-7893-be44-3113d68f56d3</link>
      <description>&lt;img style="margin:15px" align="left" height="54" width="71" alt="Periodic table, transition metal group with symbols (difficult)" src="https://content.gnoss.ws/imagenes/Documentos/imgsem/c1/c104/c104e602-ec56-7893-be44-3113d68f56d3/a54ae8df-c1e5-e543-0e61-e04982fec301_240.png"/&gt;&lt;p&gt;The transition metals are located in the central part of the periodic table. The name "transition" comes from a characteristic that these elements have to be able to be stable by themselves without the need for a reaction with another element. Almost all the elements are typical metals, of high hardness, with high melting and boiling points, in addition to being good conductors of both heat and electricity.&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/search/tag/elemento químico"&gt;elemento químico&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/número atómico"&gt;número atómico&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/configuración electrónica"&gt;configuración electrónica&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/propiedad química"&gt;propiedad química&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/dmitri mendeléyev"&gt;dmitri mendeléyev&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/tabla periódica"&gt;tabla periódica&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/tabla periódica de los elementos"&gt;tabla periódica de los elementos&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/escandio"&gt;escandio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/itrio"&gt;itrio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/lutecio"&gt;lutecio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/lawrencio"&gt;lawrencio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/titanio"&gt;titanio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/circonio"&gt;circonio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/hafnio"&gt;hafnio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/rutherfodio"&gt;rutherfodio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/vanadio"&gt;vanadio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/niobio"&gt;niobio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/tantalio"&gt;tantalio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/subnio"&gt;subnio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/seaborgio"&gt;seaborgio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/molibdeno"&gt;molibdeno&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/wolframio"&gt;wolframio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/cromo"&gt;cromo&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/manganeso"&gt;manganeso&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/tecnecio"&gt;tecnecio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/renio"&gt;renio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/bohrio"&gt;bohrio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/hasio"&gt;hasio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/osmio"&gt;osmio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/rutenio"&gt;rutenio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/hierro"&gt;hierro&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/cobalto"&gt;cobalto&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/rodio"&gt;rodio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/iridio"&gt;iridio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/meitnerio"&gt;meitnerio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/darmstatio"&gt;darmstatio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/platino"&gt;platino&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/paladio"&gt;paladio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/níquel"&gt;níquel&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/cobre"&gt;cobre&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/plata"&gt;plata&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/oro"&gt;oro&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/roentgenio"&gt;roentgenio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/copernicio"&gt;copernicio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/mercurio"&gt;mercurio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/cadmio"&gt;cadmio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/zinc"&gt;zinc&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/metales de transición"&gt;metales de transición&lt;/a&gt;&lt;/p&gt;</description>
      <author>didactalia</author>
      <category>Tabla periódica</category>
      <comments>https://naturalsciences.didactalia.net/resource/periodic-table-transition-metal-group-with/c104e602-ec56-7893-be44-3113d68f56d3#comments</comments>
      <guid>c104e602-ec56-7893-be44-3113d68f56d3</guid>
      <pubDate>Mon, 16 Dec 2019 16:58:15 GMT</pubDate>
    </item>
    <item>
      <title>Periodic table, metalloid group with symbols (difficult)</title>
      <link>https://naturalsciences.didactalia.net/resource/periodic-table-metalloid-group-with-symbols/0c7aa1a0-e657-de4d-4acd-0c35994fdd9a</link>
      <description>&lt;img style="margin:15px" align="left" height="54" width="71" alt="Periodic table, metalloid group with symbols (difficult)" src="https://content.gnoss.ws/imagenes/Documentos/imgsem/0c/0c7a/0c7aa1a0-e657-de4d-4acd-0c35994fdd9a/5e1041ea-a473-c65b-9888-e66e278a8922_240.png"/&gt;&lt;p&gt;Semimetals, also known as metalloids, share properties of both metals and nonmetals. Metallic in their appearance, they can be both bright and opaque with an easily modifiable shape but they are not good conductors of electricity.&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/search/tag/elemento químico"&gt;elemento químico&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/número atómico"&gt;número atómico&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/configuración electrónica"&gt;configuración electrónica&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/propiedad química"&gt;propiedad química&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/dmitri mendeléyev"&gt;dmitri mendeléyev&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/tabla periódica"&gt;tabla periódica&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/tabla periódica de los elementos"&gt;tabla periódica de los elementos&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/boro"&gt;boro&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/silicio"&gt;silicio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/germanio"&gt;germanio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/arsénico"&gt;arsénico&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/telurio"&gt;telurio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/polonio"&gt;polonio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/astato"&gt;astato&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/antimonio"&gt;antimonio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/metaloides"&gt;metaloides&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/semimetales"&gt;semimetales&lt;/a&gt;&lt;/p&gt;</description>
      <author>didactalia</author>
      <category>Tabla periódica</category>
      <comments>https://naturalsciences.didactalia.net/resource/periodic-table-metalloid-group-with-symbols/0c7aa1a0-e657-de4d-4acd-0c35994fdd9a#comments</comments>
      <guid>0c7aa1a0-e657-de4d-4acd-0c35994fdd9a</guid>
      <pubDate>Mon, 16 Dec 2019 16:56:27 GMT</pubDate>
    </item>
    <item>
      <title>Periodic table, metalloid group with symbols (difficult)</title>
      <link>https://naturalsciences.didactalia.net/resource/periodic-table-metalloid-group-with-symbols/5dd67c91-6e97-1d0b-7287-c0eb5a0ef316</link>
      <description>&lt;img style="margin:15px" align="left" height="54" width="71" alt="Periodic table, metalloid group with symbols (difficult)" src="https://content.gnoss.ws/imagenes/Documentos/imgsem/5d/5dd6/5dd67c91-6e97-1d0b-7287-c0eb5a0ef316/d6c29044-8225-a669-0f9e-c09137fec706_240.png"/&gt;&lt;p&gt;Semimetals, also known as metalloids, share properties of both metals and nonmetals. Metallic in their appearance, they can be both bright and opaque with an easily modifiable shape but they are not good conductors of electricity.&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/search/tag/elemento químico"&gt;elemento químico&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/número atómico"&gt;número atómico&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/configuración electrónica"&gt;configuración electrónica&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/propiedad química"&gt;propiedad química&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/dmitri mendeléyev"&gt;dmitri mendeléyev&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/tabla periódica"&gt;tabla periódica&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/tabla periódica de los elementos"&gt;tabla periódica de los elementos&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/boro"&gt;boro&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/silicio"&gt;silicio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/germanio"&gt;germanio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/arsénico"&gt;arsénico&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/telurio"&gt;telurio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/polonio"&gt;polonio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/astato"&gt;astato&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/antimonio"&gt;antimonio&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/metaloides"&gt;metaloides&lt;/a&gt;, &lt;a href="https://naturalsciences.didactalia.net/en/search/tag/semimetales"&gt;semimetales&lt;/a&gt;&lt;/p&gt;</description>
      <author>didactalia</author>
      <category>Tabla periódica</category>
      <comments>https://naturalsciences.didactalia.net/resource/periodic-table-metalloid-group-with-symbols/5dd67c91-6e97-1d0b-7287-c0eb5a0ef316#comments</comments>
      <guid>5dd67c91-6e97-1d0b-7287-c0eb5a0ef316</guid>
      <pubDate>Mon, 16 Dec 2019 16:55:50 GMT</pubDate>
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