Curium was discovered by Glenn T. Seaborg, Ralph A. James, and Albert Ghiorso at the University of California, Berkeley in 1944.
Name: Curium
Symbol: Cm
Atomic number: 96
Atomic weight: 247.07
State: solid
Group, period, block: n/a, 7, f
Color: silvery
Classification: actinide
Electron configuration: 5f7 6d1 7s2
2,8,18,32,25,9,2
Physical properties
Density: 13.51 g/cm-3
Melting point: 1613 K,1340 °C,2444 °F
Boiling point: 3383 K,3110 °C,5630 °F
Atomic properties
Oxidation states: 4, 3
Electronegativity: 1.3 (Pauling scale)
Ionization energies: 1st: 581 kJ·mol-1
Covalent radius: 169±3 pm
Van der Waals radius: no data
- Cm
Electron Configuration
Isotopes
Curium is an artificial element, it has no stable isotopes. The isotope first synthesized was 242Cm in 1944.