62SmSamarium150.362[Xe] 4f⁶ 6s²
lanthanide
Samarium
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.
A stylized shell model. Electrons are quantum objects, not particles following these literal paths. Sizes and motion are illustrative.
Electrons by shell
Electron configuration
4f6
6s2
54 is the [Xe] core total across five shells.
At a glance
- Atomic number
- 62
- Atomic mass
- 150.362 u
- Phase
- Solid
- Density
- 7.52 g/cm³
- Melting point
- 1,345 K
- Boiling point
- 2,173 K
- First ionization energy
- 544.5 kJ/mol
- Electronegativity
- 1.17
- Electron affinity
- 15.63 kJ/mol
- Molar heat capacity
- 29.54 J/(mol·K)
- Period
- 6
- Appearance
- silvery white
Conditions and isotopes affect measured properties. Some properties of short-lived elements are predicted. Electronegativity uses the Pauling scale.
Keep exploring
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