Technical data for Nitrogen

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 Presure3.39 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
Thermal Conductivity0.02583 W/(m K)
Thermal ExpansionN/A

Bulk physical properties
Density1.251 g/l[note]
Density (Liquid)N/A
Molar Volume0.011196
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

Classifications
Alternate NamesNone
Nams of AllotropesDinitrogen
Blockp
Group15
Period2
Electron Configuration[He]2s22p3
ColorColorless
Discovery
1772 in United Kingdom
Gas phaseDiatomic
CAS NumberCAS7727-37-9

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

Magnetic properties
Magnetic TypeDiamagnetic
Curie PointN/A
Mass Magnetic Susceptibility-1×10-8
Molar Magnetic Susceptibility-1.401×10-10
Volume Magnetic Susceptibility-1.251×10-8

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
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