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Samarium (Sm) - Properties


Atomic mass, symbol and atomic number

samarium is a natural element with the elementary symbol Sm and atomic number 62. In the periodic table, it belongs to the lanthanides with an atomic mass of 150.36 u. The chemical element discovered by Paul de Boisbaudran in 1853 is not radioactive and is in a solid state at room temperature.

Characteristics: Samarium (English samarium)

General
Chemical element:samarium
Symbol:sm
Atomic number:62
Group:lanthanides
Period:6
Block:f-block
Series:lanthanides
Appearance:gray-silver
explorers:Paul Emile Lecoq de Boisbaudran
Year of discovery:1853
Atomic properties
Atomic mass:150.36 u
Atomic radius:185 pm
Covalent radius:198 pm
Van der Waals radius:???
Electron configuration:Xe 4f6 6s2
ionization:544.5 kJ / mol
Physical Properties
Physical state:firmly
Density:???
Crystal structure:trigonal
Magnetism:paramagnetic
molar volume:19,98 · 10-6 m3/ mol
Mohs hardness:???
Melting point:1072 ° C
Boiling point:1900 ° C
Heat of fusion:8.6 kJ / mol
Heat of vaporization:192 kJ / mol
Thermal conductivity:13 W
Chemical properties
electronegativity:1,17

Did you know that ...

  • Samarium owes its name to the mineral Samarskit, which in turn was named after the engineer Vasili Samarsky-Bykhovets?
  • Samarium belongs to the metals of the rare earths?
  • Bone metastasis be irradiated with a samarium isotope?