Tantalum
Electron Configuration: 2,8,18,32,11,2
Enthalpy of Fusion (kJ mol-1): 31.4
Enthalpy of Vaporisation (kJ mol-1): 758.2
Atomic Radii
Atomic Radius 145 pm
Bohr Radius 200 pm
Covalent Radius 138 pm
Van der Waals 0 pm
Oxidation States
Main Ta+5
Other Ta-3, Ta-1, Ta+1, Ta+2, Ta+3, Ta+6
Ionisation Energies (kJ mol-1) show graph
M - M+ 761
M+ - M2+ 1500
M2+ - M3+ 2100
M3+ - M4+ 3200
M4+ - M5+ 4300
Covalent Bonds (kJ mol-1)