We Use Cookies
We use cookies and other tracking technologies to improve your browsing experience on our website, to show you personalized content and targeted ads, to analyze our website traffic, and to understand where our visitors are coming from. For more information, please review our cookie policy and privacy policy.
By choosing I Accept, you consent to our use of cookies and other tracking technologies.

Samarium (Sm)

From Wikipedia, the free encyclopediaSamarium 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.

Samarium in the periodic table

Atomic number62
Element categoryLanthanide

Physical properties

Phase at STPSolid
Density7.52 g/cm3
Atomic weight150.362 u
Melting point1345 K
1071.85 °C
1961.33 °F
Boiling point2173 K
1899.85 °C
3451.73 °F

Atomic properties

Electronegativity (Pauling Scale)1.17
Electron affinity15.63 kJ/mol
Oxidation states0, +2, +3
(a mildly basic oxide)
Ionization energies
1544.5 kJ/mol
2 1070 kJ/mol
3 2260 kJ/mol
4 3990 kJ/mol

Electron configuration

Elektronkonfiguration (shorthand)[Xe] 4f6 6s2
Electron configuration1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f6 5s2 5p6 6s2
Electrons per shell2, 8, 18, 24, 8, 2


Discovered byLecoq de Boisbaudran
Warning: Undefined variable $footer in /customers/a/d/1/periodictable.one/httpd.www/inc/footer.php on line 34