62Solid
Sm 150.36 Atomic mass · uLanthanides
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.
Discovery 1853 (Lecoq de Boisbaudran)
K2L8M18N24O8P2
Physical properties
Values for the element in its standard state.
- Density
- 7.353g/cm³
- Melting point
- 1,345K
- Boiling point
- 2,076K
- Atomic radius
- Not available
- Bonding type
- Metallic
- Molar heat
- 29.54J/(mol·K)
Inside the atom
Electron arrangement and the energy behind its behavior.
Full electron configuration
1s, 2 electrons; 2s, 2 electrons; 2p, 6 electrons; 3s, 2 electrons; 3p, 6 electrons; 3d, 10 electrons; 4s, 2 electrons; 4p, 6 electrons; 4d, 10 electrons; 5s, 2 electrons; 5p, 6 electrons; 4f, 6 electrons; 6s, 2 electrons;
[Xe] represents 54 core electrons. The full view shows them explicitly.
62 electrons Orbital order preserved from source
- Electronegativity
- 1.17Pauling scale
- First ionization energy
- 545kJ/mol
- Electron affinity
- 50kJ/mol
- Van der Waals radius
- Not available
Sm SamariumAtomic number 62
545kJ/mol
Atomic numberGaps indicate unavailable data
About samarium
- Appearance
- Silvery white
- Discovery
- 1853 (Lecoq de Boisbaudran)
- Data source
- Read the reference
A missing value means it is unavailable in this reference dataset. Values can vary with measurement method and conditions.