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 |
Electron configuration | 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 4f14 5d10 6s2 6p6 5f12 6d0 7s2 |
State | Solid |
Thermal conductivity [W m-1K-1] | 10 |
Discovery | 1954 |
1.st ionization energy [eV] | 6.5 |
Stable isotopes | 0 |
Unstable isotopes | 10 |