Symbol
Cm
Atomic Number
96
Atomic Mass
247
Protons
96
Neutrons
151
Electrons
96
Type
Actinide
Isotopes
Curium-244, Curium-246, Curium-247
Discovery Year
1944
Discovered By
Glenn T. Seaborg, Albert Ghiorso, and Emilio Segrè
Group
3
Period
7
Boiling Point
3515°F
Melting Point
1340°F
Electron Configuration
[Rn] 7s² 5f⁷
Density (g/cm³)
13.51
Crystal Structure
Orthorhombic
Magnetism
Paramagnetic
Abundance in Earth's Crust
Trace
Phase at Room Temperature
Solid