98Cf
Californium
ActinideCalifornium (Cf) is element 98, an actinide, in period 7 of the periodic table. Its atomic mass is usually given as 251, it melts at 900 °C and boils at 1472 °C. Discovered by Lawrence Berkeley Lab, 1950.
Atomic Number98
SymbolCf
NameCalifornium
Atomic Weight251 u
CategoryActinide
Period7
Melting Point900 °C
Boiling Point1472 °C
Density15.1 g/cm³
Electron Config[Rn] 5f10 7s2
Discovered ByLawrence Berkeley Lab, 1950