Technetium
Electron Configuration: 2,8,18,14,1
Enthalpy of Fusion (kJ mol-1): 23.81
Enthalpy of Vaporisation (kJ mol-1): 585.22
Atomic Radii
Atomic Radius 135 pm
Bohr Radius 183 pm
Covalent Radius 156 pm
Van der Waals 0 pm
Oxidation States
Main Tc+4, Tc+5, Tc+7
Other Tc-1, Tc0, Tc+6
Ionisation Energies (kJ mol-1) show graph
M - M+ 702
M+ - M2+ 1472
M2+ - M3+ 2850
M3+ - M4+ 4100
M4+ - M5+ 5700
M5+ - M6+ 7300
M6+ - M7+ 9100
M7+ - M8+ 15600
M8+ - M9+ 17800
M9+ - M10+ 19900