Atomic number:96

Group numbers:3

Period:7

Electronic configuration:[Rn] 5f⁷ 6d¹ 7s²

Formal oxidation number:+3

Electronegativities:-

Atomic radius / pm:174

Relative atomic mass:[247]

 

Curium was discovered by Glenn T. Seaborg, Ralph A. James, and Albert Ghiorso (US) in 1944. Named in honour of Pierre and Marie Curie. It is a silvery, malleable, synthetic radioactive metal. So radioactive it glows in the dark. Curium was made by bombarding plutonium with helium ions.

Density / g dm^-3:13300 (calc.)

Molar volume / cm³mol^-1:18.57 (calc.)

Electrical resistivity / μΩcm:- (20 °C)

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

Melting point / °C:1345

Boiling point / °C:-

Heat of fusion / kJ mol^-1:-

Heat of vaporization / kJ mol^-1:-

Heat of atomization / kJ mol^-1:382

1st ionization energy / kJ mol^-1:580.85

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:-