Compare Elements
Select up to 4 elements to compare their properties side by side.
Fm
Fermium
#100 · Actinide
| Mass | 257.09511 u |
| Density | 9.7 g/cm³ |
| Melting | 1800.0 K |
| Electronegativity | 1.3 |
| Ionization Energy | 627.0 kJ/mol |
| Block | f-block |
| State (RT) | Solid |
| Config | [Rn] 5f12 7s2 |