| Attribute | Value |
|---|---|
| Symbol | Fm |
| Standard state | Solid |
| Atomic mass | 257.09511 u |
| Electron configuration | [Rn]5f¹²7s² |
| Oxidation states |
|
| Electronegativity (pauling scale) | 1.3 |
| Ionization energy | 6.5 eV |
| Melting point | 1800 K |
| Atomic number | 100 |
| Group name | Actinide |
| Discovered | 1952 year |
| Atomic radius (van der waals) | Add |
| Electron affinity | Add |
| Boiling point | Add |
| Density | Add |