96 Cm 247
Curium
Actinide
Curium (Cm) is a chemical element with atomic number 96, classified as a actinide. At room temperature it is a solid. It was discovered in 1944 by Glenn T. Seaborg et al..
Properties
- Atomic number
- 96
- Atomic mass
- 247 u
- Category
- Actinide
- Group
- 0
- Period
- 7
- Block
- f-block
- Electron configuration
- [Rn] 5f⁷ 6d¹ 7s²
- Phase at STP
- Solid
- Density
- 13.51 g/cm³
- Melting point
- 1613 K (1339.8 °C)
- Boiling point
- 3383 K (3109.8 °C)
- Electronegativity
- 1.28
- Atomic radius
- 245 pm
- Ionization energy
- 5.991 eV
- Discovery
- 1944 · Glenn T. Seaborg et al.
Common uses
Space missions, research, neutron sources
Did you know?
Named after Marie and Pierre Curie and glows purple in the dark.
Experiment with the elements
Curium doesn't form any compounds in our lab yet, but the periodic table sandbox lets you combine dozens of other real elements into real compounds — water, table salt, ammonia and many more — with their true chemical formulas.