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nitrogen |
3 definitions found From Webster's Revised Unabridged Dictionary (1913) [web1913]: Nitrogen \Ni`tro*gen\, n. [L. nitrum natron + -gen: cf F. nitrog[`e]ne. See {Niter}.] (Chem.) A colorless nonmetallic element, tasteless and odorless, comprising four fifths of the atmosphere by volume. It is chemically very inert in the free state, and as such is incapable of supporting life (hence the name {azote} still used by French chemists); but it forms many important compounds, as ammonia, nitric acid, the cyanides, etc and is a constituent of all organized living tissues, animal or vegetable. Symbol N. Atomic weight 14. It was formerly regarded as a permanent noncondensible gas, but was liquefied in 1877 by Cailletet of Paris, and Pictet of Geneva. From WordNet r 1.6 [wn]: nitrogen n : a common nonmetallic element that is normally a colorless odorless tasteless inert diatomic gas; constitutes 78 percent of the atmosphere by volume; a constituent of all living tissues [syn: {N}, {atomic number 7}] From Elements database 20001107 [elements]: nitrogen Symbol: N Atomic number: 7 Atomic weight: 14.0067 Colourless, gaseous element which belongs to group 15 of the periodic table. Constitutes ~78% of the atmosphere and is an essential part of the ecosystem. Nitrogen for industrial purposes is acquired by the fractional distillation of liquid air. Chemically inactive, reactive generally only at high temperatures or in electrical discharges. It was discovered in 1772 by D. Rutherford.
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