Chemical Elements.com - Samarium (Sm)

Show Table With:
   Name
   Atomic Number
   Atomic Mass
   Electron Configuration
   Number of Neutrons
   Melting Point
   Boiling Point
   Date of Discovery
   Crystal Structure

Element Groups:
   Alkali Metals
   Alkaline Earth Metals
   Transition Metals
   Other Metals
   Metalloids
   Non-Metals
   Halogens
   Noble Gases
   Rare Earth Elements

Basic Information | Atomic Structure | Isotopes | Related Links | Citing This Page

Basic Information

Name: Samarium
Symbol: Sm
Atomic Number: 62
Atomic Mass: 150.36 amu
Melting Point: 1072.0 °C (1345.15 K, 1961.6 °F)
Boiling Point: 1900.0 °C (2173.15 K, 3452.0 °F)
Number of Protons/Electrons: 62
Number of Neutrons: 88
Classification: Rare Earth
Crystal Structure: Rhombohedral
Density @ 293 K: 7.54 g/cm³
Color: silver

Atomic Structure

Number of Energy Levels: 6

First Energy Level:

Second Energy Level:

Third Energy Level:

Fourth Energy Level:

Fifth Energy Level:

Sixth Energy Level:

Isotopes

Isotope	Half Life
Sm-144	Stable
Sm-145	340.0 days
Sm-146	1.03E8 years
Sm-147	1.06E11 years
Sm-148	7.0E15 years
Sm-149	Stable
Sm-150	Stable
Sm-151	90.0 years
Sm-152	Stable
Sm-153	1.92 days
Sm-154	Stable

Facts

Date of Discovery: 1879
Discoverer: Paul Emile Lecoq de Boisbaudran
Name Origin: smarskite (mineral)
Uses: used in magnets, in alloys with cobalt, and nuclear reactors
Obtained From: found with other rare earths

MLA Format for Citing This Page

Bentor, Yinon. Chemical Element.com - Samarium. <http://www.chemicalelements.com/elements/sm.html>.

For more information about citing online sources, please visit the MLA's Website.