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Oxygen

1:38

Oxygen Element properties

1:58

The Chemical Elements: The Discovery of Oxygen

2:19

Oxygen

1:32

The Element Oxygen - Explanation of the Elements

1:13

Element 8 - Oxygen

Oxygen is a chemical element with symbol O and atomic number 8. It is a member of the chalcogen group on the periodic table, a highly reactive nonmetal, and an oxidizing agent that readily forms oxides with most elements as well as with other compounds. By mass, oxygen is the third-most abundant element in the universe, after hydrogen and helium. At standard temperature and pressure, two atoms of the element bind to form dioxygen, a colorless and odorless diatomic gas with the formula O2. Diatomic oxygen gas constitutes 20.8% of the Earth's atmosphere. As compounds including oxides, the element makes up almost half of the Earth's crust.
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  • History 

  • Characteristics 

  • Biological role of O<sub>2</sub> 

  • Industrial production 

  • Storage 

  • Applications 

  • Compounds 

  • Safety and precautions