Atomic Radii
Atomic Radius
Bohr Radius
Covalent Radius
Van der Waals
| Calcium | |
| Electron Configuration | 2,8,8,2 |
| Electron Configuration | [Ar] 4s2 |
| Electronegativity | 1.00 |
| Enthalpy of Fusion | 9.33 kJ mol-1 |
| Enthalpy of Vaporisation | 150.6 kJ mol-1 |
| Heat Capacity | 25.929 J mol-1 K-1 |
| Thermal Conductivity | 201 W m-1 K-1 |
| Thermal Expansion | 22.3 μm m-1 K-1 |
| Magnetic ordering | Paramagnetic |
| Electrical resistivity | 33.6 Ω m |
| Speed of sound | 3810 m s-1 |
| Young's modulus | 20 GPa |
| Shear modulus | 3810 GPa |
| Bulk modulus | 17 GPa |
| Poisson ratio | 0.31 |
| Mohs hardness | 1.75 |
| Brinell hardness | 167 MPa |
| Atomic Radii |
|
| Atomic Radius
|
180 pm |
| Bohr Radius
|
194 pm |
| Covalent Radius
|
174 pm |
| Van der Waals
|
0 pm |
| Oxidation States |
|
| Main
|
Ca+2 |
| Other
|
|
Ionisation Energies (kJ mol-1)  |
|
| M - M+ |
589.7 |
| M+ - M2+ |
1145 |
| M2+ - M3+ |
4910 |
| M3+ - M4+ |
6474 |
| M4+ - M5+ |
8144 |
| M5+ - M6+ |
10496 |
| M6+ - M7+ |
12320 |
| M7+ - M8+ |
14207 |
| M8+ - M9+ |
18191 |
| M9+ - M10+ |
20385 |