Samarium (Sm)
Samarium
Samarium (Sm) is a lanthanide in period 6. Its relative atomic mass is 150.36 and the molar mass of the atom is 150.36 g/mol.
Atomic number 62
Atomic mass 150.36
Molar mass 150.36 g/mol
Category Lanthanide Solid
Properties of samarium
| Atomic number | 62 |
|---|---|
| Symbol | Sm |
| Latin name | Samarium |
| Relative atomic mass | 150.36 |
| Molar mass | 150.36 g/mol |
| Group, period, block | —, 6, f |
| Category | Lanthanide |
| State at 20 °C | Solid |
| Electron configuration | [Xe] 4f⁶ 6s² |
| Electronegativity (Pauling) | 1.17 |
| Atomic radius | 185 pm |
Electron configuration of samarium
Electrons per shell
K2L8M18N24O8P2
Full notation
1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f⁶ 5s² 5p⁶ 6s²
Noble-gas notation
62 protons · 62 electrons[Xe] 4f⁶ 6s²
Formula and compounds of samarium
Simple substanceSmsamariumMolar mass of Sm: 150.36 g/mol
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Frequently asked questions
The relative atomic mass of samarium is 150.36, so the molar mass of the atom is 150.36 g/mol.
Full: 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f⁶ 5s² 5p⁶ 6s². Noble-gas notation: [Xe] 4f⁶ 6s².