SymbolCf
Latin nameCalifornium
Atomic number98
Period7
Element categoryInner transition elements
Relative atomic mass251.0796
GroupIII.B
Oxidation numbers
2, 3, 4
Electron configuration
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 4f14 5d10 6s2 6p6 5f10 6d0 7s2
Density [g/cm3]
14
State
Solid
Melting point [°C]
900
Thermal conductivity [W m-1K-1]
10
Discovery
1950
1.st ionization energy [eV]
6.3
Stable isotopes
0
Unstable isotopes
12