Science Reference

Oxygen

Oxygen is a chemical element in the periodic table.

It has the symbol O and atomic number 8.

The element is the most common on Earth, composing around 46% of the mass of Earth's crust, and is the third most common element in the universe.

Oxygen is a major component of air, produced by plants during photosynthesis..

For more information about the topic Oxygen, read the full article at Wikipedia.org, or see the following related articles:

Note: This page refers to an article that is licensed under the GNU Free Documentation License. It uses material from the article Oxygen at Wikipedia.org. See the Wikipedia copyright page for more details.

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