Template:Infobox nitrogen

Nitrogen,  ₇N

Liquid nitrogen
Spectral lines of nitrogen
General properties
Name, symbol	nitrogen, N
Appearance	colorless gas, liquid or solid
Pronunciation	/ˈnaɪtrədʒən/ NY-trə-jən
Nitrogen in the periodic table
– ↑ N ↓ P carbon ← nitrogen → oxygen
Atomic number (Z)	7
Group, block	group 15 (pnictogens), p-block
Period	period 2
Element category	diatomic nonmetal
Standard atomic weight (Ar)	14.007 (14.00643–14.00728)
Electron configuration	[He] 2s2 2p3
per shell	2, 5
Physical properties
Phase	gas
Melting point	63.15 K ​(−210.00 °C, ​−346.00 °F)
Boiling point	77.355 K ​(−195.795 °C, ​−320.431 °F)
Density at stp (0 °C and 101.325 kPa)	1.251 g/L
when liquid, at b.p.	0.808 g/cm3
Triple point	63.151 K, ​12.52 kPa
Critical point	126.192 K, 3.3958 MPa
Heat of fusion	(N2) 0.72 kJ/mol
Heat of vaporization	(N2) 5.56 kJ/mol
Molar heat capacity	(N2) 29.124 J/(mol·K)
vapor pressure P (Pa) 1 10 100 1 k 10 k 100 k at T (K) 37 41 46 53 62 77
Atomic properties
Oxidation states	5, 4, 3, 2, 1, −1, −2, −3 ​(a strongly acidic oxide)
Electronegativity	Pauling scale: 3.04
Ionization energies	1st: 1402.3 kJ/mol 2nd: 2856 kJ/mol 3rd: 4578.1 kJ/mol (more)
Covalent radius	71±1 pm
Van der Waals radius	155 pm
Miscellanea
Crystal structure	​hexagonal
Speed of sound	353 m/s (gas, at 27 °C)
Thermal conductivity	25.83×10−3 W/(m·K)
Magnetic ordering	diamagnetic
CAS Number	7727-37-9
History
Discovery	Daniel Rutherford (1772)
Named by	Jean-Antoine Chaptal (1790)
Most stable isotopes of nitrogen
iso NA half-life DM DE (MeV) DP 13N syn 9.965 min ε 2.220 13C 14N 99.634% 14N is stable with 7 neutrons 15N 0.366% 15N is stable with 8 neutrons

References

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