Samarium

Statistics:

• Name: Samarium
• Symbol: Sm
• Classification: Lanthanide
• Atomic Number: 62
• Atomic Mass: 150.36 g/mol
• Density: 7.54 g/cm³
• Melting: 1072°C
• Boiling: 1778°C
• Protons & Electrons:62
• Neutrons:88
• Discovered: 1879
• Discovered By: Lecoq de Boisbaudran
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Electrons Per Energy Level:

• Level 1: 2
• Level 2: 8
• Level 3: 18
• Level 4: 24
• Level 5: 8
• Level 6: 2

Isotopes:

Isotope: Half-life

• ¹⁴⁴Sm: stable
• ¹⁴⁵Sm: 340 days
• ¹⁴⁶Sm: 1.03e+8 years
• ¹⁴⁷Sm: 1.06e+11 years
• ¹⁴⁸Sm: 1.06e+11 years
• ¹⁴⁹Sm: 2e+15 years
• ¹⁵⁰Sm: stable
• ¹⁵¹Sm: 90 years
• ¹⁵²Sm: stable
• ¹⁵³Sm: 46.284 hours
• ¹⁵⁴Sm: stable

Brief Summary

Samarium is a Lanthanide with the symbol 'Sm' and contains 62 Protons & Electrons with 88 neutrons in the nucleus of the atom. Samarium has an atomic mass of 150.36 g/mol and, at a temperature of 20°C, has a density of 7.54 g/cm³. It will melt at a temperature of 1072°C and boil at 1778°C.

Samarium was discovered by Lecoq de Boisbaudran in 1879 and is named 'Samarium' mineral: smarskite.

Some common usages for Samarium: used in magnets, in alloys with cobalt, and nuclear reactors.

Definitions and Notes

Density listed is at a temperature of 20°C.

Isotopes are forms of an element who have the same atomic number but different mass because they contain different number of neutrons.

Half-life is the time required for a quantity of a subject to fall to half of its current quantity.

MLA Citing Format

Samarium :: Sm :: 62 - Chemical Element. 22 Nov. 2008 <http://www.chemicalelement.com/element/samarium.html>.