Atomic Radii
Atomic Radius
Bohr Radius
Covalent Radius
Van der Waals
| Technetium | |
| Electron Configuration | 2,8,18,13,2 |
| Electron Configuration | [Kr] 4d5 5s2 |
| Electronegativity | 1.9 |
| Enthalpy of Fusion | 23.81 kJ mol-1 |
| Enthalpy of Vaporisation | 585.22 kJ mol-1 |
| Heat Capacity | 24.27 J mol-1 K-1 |
| Thermal Conductivity | ? W m-1 K-1 |
| Thermal Expansion | ? μm m-1 K-1 |
| Magnetic ordering | No data |
| 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)  |
|
| 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 |