Californium

californio

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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