Atomic number:98

Group numbers:3

Period:7

Electronic configuration:[Rn] 5f¹⁰ 7s²

Formal oxidation number:+3

Electronegativities:-

Atomic radius / pm:186

Relative atomic mass:[251]

 

Californium was discovered by Stanley G. Thompson, Kenneth Street Jr., and Albert Ghiorso (US) in 1950. Named after the State and University of California, USA. It is a synthetic radioactive metal and a powerful neutron emitter. Californium was made by bombarding curium with helium ions.

Density / g dm^-3:-

Molar volume / cm³mol^-1:-

Electrical resistivity / μΩcm:- (20 °C)

Thermal conductivity / W m^-1K^-1:-

Melting point / °C:900

Boiling point / °C:-

Heat of fusion / kJ mol^-1:-

Heat of vaporization / kJ mol^-1:-

Heat of atomization / kJ mol^-1:175

1st ionization energy / kJ mol^-1:607.86

2nd ionization energy / kJ mol^-1:-

3rd ionization energy / kJ mol^-1:-

in the atmosphere / ppm:-

in the Earth's crust / ppm:-

in the oceans / ppm:-