Atomic Radii
Atomic Radius
Bohr Radius
Covalent Radius
Van der Waals
| Thorium | |
| Electron Configuration | 2,8,18,32,18,10,2 |
| Electron Configuration | [Rn] 6d2 7s2 |
| Electronegativity | 1.3 |
| Enthalpy of Fusion | 19.2 kJ mol-1 |
| Enthalpy of Vaporisation | 513.7 kJ mol-1 |
| Heat Capacity | 26.230 J mol-1 K-1 |
| Thermal Conductivity | 54.0 W m-1 K-1 |
| Thermal Expansion | 11.0 μm m-1 K-1 |
| Magnetic ordering | No data |
| Electrical resistivity | 147 Ω m |
| Speed of sound | 2490 m s-1 |
| Young's modulus | 79 GPa |
| Shear modulus | 2490 GPa |
| Bulk modulus | 54 GPa |
| Poisson ratio | 0.27 |
| Mohs hardness | 3.0 |
| Vickers hardness | 350 MPa |
| Brinell hardness | 400 MPa |
| Atomic Radii |
|
| Atomic Radius
|
180 pm |
| Bohr Radius
|
0 pm |
| Covalent Radius
|
0 pm |
| Van der Waals
|
0 pm |
| Oxidation States |
|
| Main
|
Th+4 |
| Other
|
Th+2, Th+3 |
Ionisation Energies (kJ mol-1)  |
|
| M - M+ |
587 |
| M+ - M2+ |
1110 |
| M2+ - M3+ |
1978 |
| M3+ - M4+ |
2780 |