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It is a nonmetal. Oxygen is part of a group called chalcogens. Chalcogens are the group of elements that form group vi of the periodic table.
Chemical Info
Name: Oxygen
Chemical Symbol: O
Atomic Mass: 15.9994
Atomic Number: 8
Density: 1.426 g/cm3
Valence: -2
Isotopes
O-15 has a half life of 122.2 seconds. The isotope O-16 is stable. The isotope O-17 is stable. The isotope O-18 is stable.
History
Oxygen was discovered by a scientist named John Priestly in 1774. He found this by heating Mercury(II) Oxide. This then broke the mercury and oxygen apart leaving two atoms of mercury and one oxygen atom...
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