(So named (Greek nitron, niter + French -gène, -gen) in 1790 by J. A. Chaptal, because niter resulted when it was sparked with oxygen in the presence of potassium hydroxide) A colorless, tasteless, odorless gaseous chemical element forming nearly four fifths of the atmosphere. It is a component of all proteins and nucleic acids.

Symbol: N
Atomic number: 7
Atomic weight: 14.00674
Density (at 0°C with 101,325 pascals): 1.2506 g/L
Melting point: -209.86°C
Boiling point: -195.79°C
Valence: -3, +3, +5
Ground state electron configuration: [He]2s22p3

Symbol: N
Atomic Number: 7
Boiling Point: 77.344 K
Melting Point: 63.15 K
Density at 300K: 1.251 g/cm3
Covalent radius: 0.75
Atomic radius: 0.75
Atomic volume: 17.30 cm3/mol
First ionization potental: 14.534 cm3/mol
Specific heat capacity: 1.042 Jg-1K-1
Thermal conductivity: 0.02598 Wm-1K-1
Electrical conductivity: N/A
Heat of fusion: 0.36 kJ/mol
Heat of vaporization: 2.7928 kJ/mol
Electronegativity: 3.04 (Pauling's)

Previous Carbon---Oxygen Next
To the Periodic Table

Ni`tro*gen (?), n. [L. nitrum natron + -gen: cf. F. nitrogene. 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.


© Webster 1913.

Log in or register to write something here or to contact authors.