n2

2 definitions found

n2 - Collaborative International Dictionary of English v.0.48 :

  Nitrogen \Ni`tro*gen\ (n[imac]"tr[-o]*j[e^]n), n. [L. nitrum
     natron + -gen: cf. F. nitrog[`e]ne. See Niter.] (Chem.)
     A colorless nonmetallic element of atomic number 7, tasteless
     and odorless, comprising four fifths of the atmosphere by
     volume in the form of molecular nitrogen (N2). 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, such as ammonia, nitric acid, the cyanides, etc,
     and is a constituent of all organized living tissues, animal
     or vegetable. Symbol N. Atomic weight 14.007. It was formerly
     regarded as a permanent noncondensible gas, but was liquefied
     in 1877 by Cailletet of Paris, and Pictet of Geneva, and
     boils at -195.8 [deg] C at atmospheric pressure. Liquid
     nitrogen is used as a refrigerant to store delicate
     materials, such as bacteria, cells, and other biological
     materials.
     [1913 Webster +PJC]

  Chromophore \Chro"mo*phore\, n. [Gr. ? color + fe`rein to bear.]
     (Chem.)
     Any chemical group or residue (as NO2; N2; or O2) which
     imparts some decided color to the compound of which it is an
     ingredient.
     [1913 Webster]