Template:Infobox hydrogen

neutronium ← hydrogen → helium e− ↑ H ↓ Li 1H Periodic table
Appearance
colorless gas
General
Name, symbol, number	hydrogen, H, 1
Element category	nonmetal
Group, period, block	1, 1, s
Standard atomic weight	1.00794(7) g·mol−1
Electron configuration	1s1
Electrons per shell	1 (Image)
Physical properties
Phase	gas
Density	(0 °C, 101.325 kPa) 0.08988 g/L
Melting point	14.01 K, −259.14 °C, −434.45 °F
Boiling point	20.28 K, −252.87 °C, −423.17 °F
Triple point	13.8033 K (-259°C), 7.042 kPa
Critical point	32.97 K, 1.293 MPa
Heat of fusion	(H2) 0.117 kJ·mol−1
Heat of vaporization	(H2) 0.904 kJ·mol−1
Specific heat capacity	(25 °C) (H2) 28.836 J·mol−1·K−1
Vapor pressure
P/Pa 1 10 100 1 k 10 k 100 k at T/K         15 20
Atomic properties
Oxidation states	1, −1 (amphoteric oxide)
Electronegativity	2.20 (Pauling scale)
Ionization energies	1st: 1312.0 kJ·mol−1
Covalent radius	31±5 pm
Van der Waals radius	120 pm
Miscellaneous
Crystal structure	hexagonal
Magnetic ordering	diamagnetic
Thermal conductivity	(300 K) 180.5 m W·m−1·K−1
Speed of sound	(gas, 27 °C) 1310 m/s
CAS registry number	1333-74-0
Most stable isotopes
Main article: Isotopes of hydrogen
iso N.A. half-life DM DE (MeV) DP 1H 99.985% 1H is stable with 0 neutrons 2H 0.015% 2H is stable with 1 neutron 3H trace 12.32 y β− 0.01861 3He

References

This reference list does not appear in the article.