59 Pr
Lanthanide
Praseodymium
Used in aircraft engines.
Properties of Praseodymium
- Atomic number (Z)
- 59
- Symbol
- Pr
- Atomic mass
- 140.91 g/mol
- Category
- Lanthanide
- Group
- 3
- Period
- 6
- Electron configuration
- [Xe] 4f³ 6s²
- Electronegativity (Pauling)
- 1.13
- Atomic radius
- 247 pm
- First ionization energy
- 527 kJ/mol
- Melting point
- 1208 K (934.9 °C)
- Boiling point
- 3793 K (3519.8 °C)
- Density
- 6.773 g/cm³
- Phase at 25 °C
- Solid
- Discovered
- Discovered in 1885