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The Danish physicist Niels Bohr proposed, in 1913, an atomic model capable of explaining the stability of matter. Bohr, based on Max Planck's quantum theory and Ernest Rutherford's nuclear the ...
Following a classification according to the bonding and ionization properties of the elements, the elements of the periodic table can be classified as:
Metals
Semimetals
No metals
Noble gases
Th ...
Learn with this interactive gamee the components of the Male Endocrine System. You have to choose the right answer from a list of several options. Zoom in or zoom out the image in order to adjust it ...
Halogens (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 ...
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, t ...
Learn with this interactive game the taste bud components. You have to choose the right answer from a list of several options.Zoom in or zoom out the image in order to adjust it to the size of your d ...
Learn with this interactive game the components of the Female Endocrine System. You have to point out each exact location on the human body image. Zoom in or zoom out the image in order to adjust it ...
The periodic table of the elements is the way proposed by Dmitri Mendeléyev in 1869 to arrange the chemical elements, which are ordered by their atomic number, their electron configuration and ...
Learn with this interactive gamee the components of the Female Endocrine System. You have to choose the right answer from a list of several options. Zoom in or zoom out the image in order to adjust i ...
Actinides are also known as "internal transition elements." They have radioactive properties and are extremely unstable, having a very short half-life. Within the periodic table, they are us ...
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