出典:Wikipedia
出典:『Wikipedia』 (2011/06/09 22:29 UTC 版)
Nitrogen (
/ˈnaɪtrɵdʒɨn/ ny-trə-jin) is a chemical element that has the symbol N, atomic number of 7 and atomic mass 14.00674 u. Elemental nitrogen is a colorless, odorless, tasteless, and mostly inert diatomic gas at standard conditions, constituting 78.08% by volume of Earth's atmosphere. The element nitrogen was discovered as a separable component of air, by Scottish physician Daniel Rutherford, in 1772.
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