62 Sm Samarium 150.36
Lanthanide
Samarium 钐
[Xe] 4f⁶ 6s²
- Period 6
- Group —
- Block f
- Solid
Electron configuration
1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f⁶ 5s² 5p⁶ 6s²
Orbital diagram (valence)
- Electrons per shell
- 2, 8, 18, 24, 8, 2
- Unpaired electrons
- 6
- Zeff (Slater)
- 2.85
Properties
- Atomic weight
- 150.36
- Electronegativity (Pauling)
- 1.17
- First ionization energy
- 544.6 kJ/mol
- Electron affinity
- no data
- Covalent radius
- 198 pm
- van der Waals radius
- 229 pm
- Melting point
- 1347 K
- Boiling point
- 2067 K
- Density
- 7.52 g/cm³
- Melting / boiling point
- 1073.8 °C / 1793.8 °C
- Common oxidation states
- +3, +2
- Discovered
- 1879
Periodic trend
Data: PubChem periodic table (public domain); atomic weights are IUPAC abridged standard values; covalent radii from Cordero et al. (2008).