| Fermium | |
| Electrons per shell | 2,8,18,32,30,8,2 |
| Electron Configuration | [Rn] 5f12 7s2 |
| Ground state | 3H6 |
| Atomic Volume | cm3 mol-1 |
| Electronegativity | 1.3 |
| Magnetic ordering | No data |
 Thermal Properties |
|
| Enthalpy of Atomization | No data. |
| Enthalpy of Fusion | No data. |
| Enthalpy of Vaporisation | No data. |
| Heat Capacity | No data. |
| Thermal Conductivity | No data. |
| Thermal Expansion | No data. |
| Electrical Properties |
|
| Electrical resistivity | No data. |
| Electrical conductivity | ? 106/cm Ω |
| Chemical Properties |
|
| Electrochemical Equivalent | 3.1974 g Ah-1 |
| Ionization Potential | |
 First
|
6.5 |
| Atomic Radii |
|
| Empirical
|
No data. |
| Bohr Radius
|
No data. |
| Covalent Radius
|
No data. |
| Van der Waals
|
No data. |
| Triple covalent
|
No data. |
| Metallic
|
No data. |
| Oxidation States |
|
| Main
|
Fm+2, Fm+3 |
| Other
|
|
Ionisation Energies (kJ mol-1)  |
|
| M - M+ |
627 |