Germanium
Electron Configuration: 2,8,18,4
Enthalpy of Fusion (kJ mol-1): 34.7
Enthalpy of Vaporisation (kJ mol-1): 327.6
Atomic Radii
Atomic Radius 125 pm
Bohr Radius 125 pm
Covalent Radius 122 pm
Van der Waals 0 pm
Oxidation States
Main Ge+2, Ge+4
Other
Ionisation Energies (kJ mol-1) show graph
M - M+ 762.1
M+ - M2+ 1537
M2+ - M3+ 3302
M3+ - M4+ 4410
M4+ - M5+ 9020
M5+ - M6+ 11900
M6+ - M7+ 15000
M7+ - M8+ 18200
M8+ - M9+ 21800
M9+ - M10+ 27000
Covalent Bonds (kJ mol-1)
Ge-H 288
Ge-C 237
Ge-O 363
Ge-F 464
Ge-Cl 340
Ge-Ge 163