Curium - ASCII Periodic Table of the Elements

ASCII PERIODIC TABLE OF THE ELEMENTS

  Cm

Relative atomic mass: [247]

English: Curium
French: Curium
Croatian: Kurij
German: Curium
Italian: Curio
Spanish: Curio

Atomic number: 96
Group numbers: 3
Period: 7
Standard state (20 °C): solid

Discovery: 1944 Glenn T. Seaborg, Ralph A. James, Albert Ghiorso (US)

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.

Electronic configuration: [Rn] 5f⁷ 6d¹ 7s²
Formal oxidation number: +3
Atomic radius: 174 pm

Electronegativities: -
Thermal conductivity: - W/(m K)
Electrical resistivity (20 °C): - μΩcm

Melting point: 1345 °C
Boiling point: - °C

Heat of fusion: - kJ/mol
Heat of vaporization: - kJ/mol
Heat of atomization: 382 kJ/mol