Symbol Cf Atomic radius: pm - Fusion: kJ/Mole -
Name Californium Ionic radius: pm (+3)95 Boiling point: C -
Atomic number 98 Electron affinity - Melting point: C 900
Atomic weight 251.0 1st  ion potential 6.30 Specific Heat Cap: J/(g K) -
Classification Trans metal Natural form Solid Thermal Cond: W/(cm K) -
Configuration [Rn]5f107s2 Crystal structure Hex Electrical Cond -
Oxidation states 3 Density - Abundance: mg/kg-crust Synthetic
Electronegativity - Vaporization: kJ/Mole 196.0    
Californium does not occur in nature, but it was discovered in 1950 by Stanley G. Thompson, Kenneth Street, Jr., Albert Ghiorso, and Glenn T. Seaborg at the University of California, Berkeley, as a product of the helium-ion bombardment of curium-242. Uses - neutron source, source of fission fragments for research, moisture gauges for the determination of water and oil-bearing layers in oil wells