Symbol
Sm
Atomic Number
62
Atomic Mass
150.36
Protons
62
Neutrons
88
Electrons
62
Type
Lanthanide
Isotopes
Samarium-144, Samarium-145, Samarium-147, Samarium-148, Samarium-149, Samarium-150, Samarium-151, Samarium-152, Samarium-154, Samarium-155
Discovery Year
1853
Discovered By
Paul Émile Lecoq de Boisbaudran
Group
3
Period
6
Boiling Point
1791°C
Melting Point
1072°C
Electron Configuration
[Xe] 6s² 4f⁶
Density (g/cm³)
7.52
Crystal Structure
Hexagonal
Magnetism
Paramagnetic
Abundance in Earth's Crust
0.0004%
Phase at Room Temperature
Solid