Atomic Radii
Atomic Radius
Bohr Radius
Covalent Radius
Van der Waals
| Praseodymium | |
| Electron Configuration | 2,8,18,21,8,2 |
| Electron Configuration | [Xe]] 4f3 6s2 |
| Electronegativity | 1.13 |
| Enthalpy of Fusion | 11.3 kJ mol-1 |
| Enthalpy of Vaporisation | 357 kJ mol-1 |
| Heat Capacity | 27.20 J mol-1 K-1 |
| Thermal Conductivity | 12.5 W m-1 K-1 |
| Thermal Expansion | 6.7 μm m-1 K-1 |
| Magnetic ordering | No data |
| Electrical resistivity | 0.700 Ω m |
| Speed of sound | 2280 m s-1 |
| Young's modulus | 37.3 GPa |
| Shear modulus | 2280 GPa |
| Bulk modulus | 28.8 GPa |
| Poisson ratio | 0.281 |
| Vickers hardness | 400 MPa |
| Brinell hardness | 481 MPa |
| Atomic Radii |
|
| Atomic Radius
|
185 pm |
| Bohr Radius
|
247 pm |
| Covalent Radius
|
0 pm |
| Van der Waals
|
0 pm |
| Oxidation States |
|
| Main
|
Pr+3 |
| Other
|
Pr+4 |
Ionisation Energies (kJ mol-1)  |
|
| M - M+ |
523.1 |
| M+ - M2+ |
1018 |
| M2+ - M3+ |
2086 |
| M3+ - M4+ |
3761 |
| M4+ - M5+ |
5543 |