Potassium
Electron Configuration: 2,8,8,1
Enthalpy of Fusion (kJ mol-1): 2.40
Enthalpy of Vaporisation (kJ mol-1): 79.1
Atomic Radii
Atomic Radius 220 pm
Bohr Radius 243 pm
Covalent Radius 196 pm
Van der Waals 275 pm
Oxidation States
Main K+1
Other K-1 (in liquid NH3)
Ionisation Energies (kJ mol-1) show graph
M - M+ 418.8
M+ - M2+ 3051.4
M2+ - M3+ 4411
M3+ - M4+ 5877
M4+ - M5+ 7975
M5+ - M6+ 9649
M6+ - M7+ 11343
M7+ - M8+ 11942
M8+ - M9+ 16964
M9+ - M10+ 48575