Symbol
Pr
Atomic Number
59
Atomic Mass
140.90766
Protons
59
Neutrons
82
Electrons
59
Type
Lanthanide
Isotopes
Praseodymium-141, Praseodymium-143
Discovery Year
1885
Discovered By
Eugenio Domenico G. F. Marignac
Group
3
Period
6
Boiling Point
3471°C
Melting Point
931°C
Electron Configuration
[Xe] 6s² 4f³
Density (g/cm³)
6.773
Crystal Structure
Hexagonal
Magnetism
Paramagnetic
Abundance in Earth's Crust
0.004%
Phase at Room Temperature
Solid