NO. 096Actinide

Cm

Curium

Curium is a hard, radioactive actinide used mainly for research. It produces significant heat from radioactive decay and has no large-scale commercial use.

Crystal Structure

Double hexagonal close-packed

Technical Specifications

Atomic Mass247 u

Density13.5 g/cm³

Melting Point1613 K

Boiling Point3383 K

Atomic Radius174 pm

Electronegativity1.3

Ionization Energy581 kJ/mol

Electron Affinity0 kJ/mol

Bonding TypeMetallic

Oxidation States3, 4

Acid/BaseBasic

ReactivityMedium

Electron Configuration

[Rn] 5f7 6d1 7s2

Discovered ByGlenn T. Seaborg

Year1944

Known Isotopes

Cm-244Cm-247