Hydrogen
Electron Configuration: 1
Enthalpy of Fusion (kJ mol-1): 0.12
Enthalpy of Vaporisation (kJ mol-1): 0.46
Atomic Radii
Atomic Radius 21 pm
Bohr Radius 53 pm
Covalent Radius 37 pm
Van der Waals 120 pm
Oxidation States
Main H+1
Other H0, H-1
Ionisation Energies (kJ mol-1) show graph
M - M+ 1312
Covalent Bonds (kJ mol-1)
H-H 454
H-F 566
H-Cl 431
H-Br 366
H-I 299