Reference Article

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Nitrogen

Nitrogen is the chemical element in the periodic table that has the symbol N and atomic number 7.

Nitrogen constitutes 78 percent of Earth's atmosphere and is a constituent of all living tissues.

Nitrogen forms many important compounds such as amino acids, ammonia, nitric acid, and cyanides.

Note: This article excerpts material from the Wikipedia article "Nitrogen", which is released under the GNU Free Documentation License.

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