Difference between revisions of "Oxygen"
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Approximately 20% of the [[atmosphere]] is made up of oxygen. | Approximately 20% of the [[atmosphere]] is made up of oxygen. | ||
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[[Category:Chemistry]] | [[Category:Chemistry]] | ||
[[Category:Elements]] | [[Category:Elements]] | ||
Revision as of 20:01, April 2, 2007
Oxygen is a chemical element vital for life. Under normal conditions it is a colorless odorless gas consisting of two oxygen atoms which has the chemical formula O2.
Approximately 20% of the atmosphere is made up of oxygen.