Nitrogen
An element with the atomic symbol N, atomic number 7, and atomic weight [14.00643; 14.00728]. Nitrogen exists as a diatomic gas and makes up about 78% of the earth's atmosphere by volume. It is a constituent of proteins and nucleic acids and found in all living cells.
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Subheadings:
Tree Number(s): D01.268.604, D01.362.625
MeSH Unique ID: D009584
Registry Number: N762921K75
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