96 - Curium actinide
Discovered by Glenn Seaborg in 1944
- Atomic Radius (Å)
Curium is a transuranic radioactive chemical element with symbol Cm and atomic number 96. This element of the actinide series was named after Marie and Pierre Curie – both were known for their research on radioactivity. Curium was first intentionally produced and identified in July 1944 by the group of Glenn T. Seaborg at the University of California, Berkeley.
Shell | Electrons | Orbitals |
---|---|---|
1 | 2 | 2 in 1s |
2 | 8 | 2 in 2s + 6 in 2p |
3 | 18 | 2 in 3s + 6 in 3p + 10 in 3d |
4 | 32 | 2 in 4s + 6 in 4p + 10 in 4d + 14 in 4f |
5 | 25 | 2 in 5s + 6 in 5p + 10 in 5d + 7 in 5f |
6 | 9 | 2 in 6s + 6 in 6p + 1 in 6d |
7 | 2 | 2 in 7s |
247 u
Atomic Mass
3383 K
Boiling Point
1.69 Å
Covalent Radius
13.51 g/cm³
Density
27.17
Electron Affinity
1.3
Electronegativity
5.99 eV
First Ionization Energy
1340.15 K
Melting Point
7
Number of Shells
96
Atomic Number