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.
  
[[Category:Science]]
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[[Category:Chemistry]]
 
[[Category:Chemistry]]
 
[[Category:Elements]]
 
[[Category:Elements]]

Revision as of 14:01, 2 April 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.