Atomic Radii
Atomic Radius
Bohr Radius
Covalent Radius
Van der Waals
| Barium | |
| Electron Configuration | 2,8,18,18,8,2 |
| Electron Configuration | [Xe]] 6s2 |
| Electronegativity | 0.89 |
| Enthalpy of Fusion | 7.66 kJ mol-1 |
| Enthalpy of Vaporisation | 150.9 kJ mol-1 |
| Heat Capacity | 28.07 J mol-1 K-1 |
| Thermal Conductivity | 18.4 W m-1 K-1 |
| Thermal Expansion | 20.6 μm m-1 K-1 |
| Magnetic ordering | No data |
| Electrical resistivity | 332 Ω m |
| Speed of sound | 1620 m s-1 |
| Young's modulus | 13 GPa |
| Shear modulus | 1620 GPa |
| Bulk modulus | 9.6 GPa |
| Mohs hardness | 1.25 |
| Atomic Radii |
|
| Atomic Radius
|
215 pm |
| Bohr Radius
|
253 pm |
| Covalent Radius
|
198 pm |
| Van der Waals
|
0 pm |
| Oxidation States |
|
| Main
|
Ba+2 |
| Other
|
|
Ionisation Energies (kJ mol-1)  |
|
| M - M+ |
502.8 |
| M+ - M2+ |
965.1 |
| M2+ - M3+ |
3600 |
| M3+ - M4+ |
4700 |
| M4+ - M5+ |
6000 |
| M5+ - M6+ |
7700 |
| M6+ - M7+ |
9000 |
| M7+ - M8+ |
10200 |
| M8+ - M9+ |
13500 |
| M9+ - M10+ |
15100 |