| Fermium | ≡ |
| Symbol | Fm |
|---|---|
| Latin name | Fermium |
| Atomic number | 100 |
| Period | 7 |
| Element category | Inner transition elements |
| Relative atomic mass | 257.0951 |
| Group | III.B |
| Oxidation numbers | 2, 3 |
| State | Solid |
| Thermal conductivity [W m-1K-1] | 10 |
| Discovery | 1954 |
| 1.st ionization energy [eV] | 6.5 |
| Stable isotopes | 0 |
| Unstable isotopes | 10 |