Oxygen is a chemical element having the symbol O with atomic number 8. It is known as a member of the chalcogen group in the periodic table. It is known for being a highly reactive non-metal. It is also an oxidizing agent that readily forms oxides with most elements as well as with other compounds. By mass, oxygen is the third-most widely available element in the universe, after hydrogen and helium. At a specific temperature as well as pressure, two atoms of the element bind to form dioxygen, a colourless and odourless diatomic gas with the formula O2. |
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