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Technical data for Nitrogen

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Overview
NameNitrogen
SymbolN
Atomic Number7
Atomic Weight14.0067
Density1.251 g/l[note]
Melting Point-210.1 °C
Boiling Point-195.79 °C

Thermal properties
PhaseGas
Melting Point-210.1 °C
Boiling Point-195.79 °C
Absolute Melting Point63.05 K
Absolute Boiling Point77.36 K
Critical Pressure3.39 MPa (33.46 Atm)
Critical Temperature126.21 K
Heat of Fusion0.36 kJ/mol
Heat of Vaporization2.79 kJ/mol
Heat of CombustionN/A
Specific Heat1040 J/(kg K)[note]
Adiabatic Index7/5
Neel PointN/A
Thermal Conductivity0.02583 W/(m K)
Thermal ExpansionN/A

Bulk physical properties
Density1.251 g/l[note]
Density (Liquid)N/A
Molar Volume0.011196
Brinell HardnessN/A
Mohs HardnessN/A
Vickers HardnessN/A
Bulk ModulusN/A
Shear ModulusN/A
Young ModulusN/A
Poisson RatioN/A
Refractive Index1.000298
Speed of Sound333.6 m/s
Thermal Conductivity0.02583 W/(m K)
Thermal ExpansionN/A

Reactivity
Valence3
Electronegativity3.04
ElectronAffinity7 kJ/mol
Ionization Energies
1402.3, 2856, 4578.1, 7475, 9444.9, 53266.6, 64360 kJ/mol

Health and Safety
Autoignition PointN/A
FlashpointN/A
Heat of CombustionN/A
DOT Hazard Class2.2
DOT Numbers1977
EU NumberN/A
NFPA Fire Rating0
NFPA HazardsN/A
NFPA Health Rating3
NFPA Reactivity Rating0
RTECS NumberRTECSQW9700000
NFPA LabelNFPA Label

Classifications
Alternate NamesNone
Names of AllotropesDinitrogen
Blockp
Group15
Period2
Electron Configuration[He]2s22p3
ColorColorless
Discovery
1772 in United Kingdom
Gas phaseDiatomic
CAS NumberCAS7727-37-9
CID NumberCID947
Gmelin NumberN/A
NSC NumberN/A
RTECS NumberRTECSQW9700000

Electrical properties
Electrical TypeN/A
Electrical ConductivityN/A
ResistivityN/A
Superconducting PointN/A

Magnetic properties
Magnetic TypeDiamagnetic
Curie PointN/A
Mass Magnetic Susceptibility-5.4×10-9
Molar Magnetic Susceptibility-1.5×10-10
Volume Magnetic Susceptibility-6.8×10-9

Abundances
% in Universe0.1%
% in Sun0.1%
% in Meteorites0.14%
% in Earth's Crust0.002%
% in Oceans0.00005%
% in Humans2.6%

Atomic dimensions and structure
Atomic Radius56 pm
Covalent Radius75 pm
Van der Waals Radius155 pm
Crystal StructureSimple Hexagonal
Lattice Angles
π/2, π/2, 2 π/3
Lattice Constants
386.1, 386.1, 626.5 pm
Space Group NameP63/mmc
Space Group Number194

Nuclear Properties
Half-LifeStable
LifetimeStable
Decay ModeN/A
Quantum Numbers4S3/2
Neutron Cross Section1.91
Neutron Mass Absorption0.0048
Known Isotopes
10N, 11N, 12N, 13N, 14N, 15N, 16N, 17N, 18N, 19N, 20N, 21N, 22N, 23N, 24N, 25N
Stable Isotopes
14N, 15N
Isotopic Abundances
14N99.632%
15N0.368%


Notes on the properties of Nitrogen:

Density: Density given for N at 0° Celsius. 2

Specific Heat: Value given for gas phase of N . 2

Up to date, curated data provided by
Mathematica's ElementData function from Wolfram Research, Inc.

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