The element californium is named after the U.S. state of California. This soft, silvery metal does not exist in nature and is made by smashing berkelium atoms with neutrons in a particle accelerator. It is also used in the treatment of cancer.

Summary of properties (Cf)

Atomic weight[251]
Discoverer (year)Seaborg, Glenn T. (1950)
Natural formmetallic solid (hexagonal)
Electron configuration[Rn] 510 s2
Melting point (ºC)900
Boiling point (ºC)
Abundance in earth's crust (ppm)synthetic
Isotope (abundance)
Density g/cm315.1
Van der Waals radius (pm)245
Covalent radius (pm)168
Electronegativity (Pauling)1.3
Vaporization enthalpy (kJ/mol)196.00
Enthalpy of fusion (kJ/mol)-
Specific heat capacity (J/g·K) at 25ºC and 1 atm-
Thermal conductivity (W/cm·K) at 25ºC and 1 atm-
Oxidation state+3
Electron affinity (eV)
1st Ionization potential (eV)6.2817

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