62 - Samarium lanthanide
Discovered by Lecoq de Boisbaudran in 1879
Samarium is a chemical element with symbol Sm and atomic number 62. It is a moderately hard silvery metal that readily oxidizes in air. Being a typical member of the lanthanide series, samarium usually assumes the oxidation state +3.
Periodic table
| 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 | 24 | 2 in 4s + 6 in 4p + 10 in 4d + 6 in 4f |
| 5 | 8 | 2 in 5s + 6 in 5p |
| 6 | 2 | 2 in 6s |
Electron shells
silvery white Appearance
150 u Atomic Mass
1.85 Å Atomic Radius
2.07k K Boiling Point
8 Group
3 Common Oxidation States
1.98 Å Covalent Radius
7.52 g/cm³ Density
15.6 kJ/mol Electron Affinity
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f6 Electron Configuration
[Xe] 4f6 6s2 Electron Configuration (semantic)
1.17 Electronegativity
62 Electrons
5.64 eV First Ionization Energy
2, 3 ICSD Oxidation States
544.5, 1070, 2260, 3990 kJ/mol Ionization Energies
1.35k K Melting Point
28 Mendeleev Number
29.5 J/(mol·K) Molar Heat
6 Number of Shells
88 Neutrons
62 Atomic Number
17 Number of Isotopes
2, 3 Oxidation States
6 Period
Solid Phase
62 Protons
2, 8, 18, 24, 8, 2 Electron Shell Occupations