59 Pr 140.91
Praseodymium
Lanthanide
Praseodymium (Pr) is a chemical element with atomic number 59, classified as a lanthanide. At room temperature it is a solid. It was discovered in 1885 by Carl Auer von Welsbach.
Properties
- Atomic number
- 59
- Atomic mass
- 140.91 u
- Category
- Lanthanide
- Group
- 0
- Period
- 6
- Block
- f-block
- Electron configuration
- [Xe] 4f³ 6s²
- Phase at STP
- Solid
- Density
- 6.773 g/cm³
- Melting point
- 1208 K (934.9 °C)
- Boiling point
- 3793 K (3519.8 °C)
- Electronegativity
- 1.13
- Atomic radius
- 247 pm
- Ionization energy
- 5.473 eV
- Discovery
- 1885 · Carl Auer von Welsbach
Common uses
Magnets, lasers, arc lighting, glass coloring
Did you know?
Creates brilliant green color and used in aircraft engines.
Experiment with the elements
Praseodymium doesn't form any compounds in our lab yet, but the periodic table sandbox lets you combine dozens of other real elements into real compounds — water, table salt, ammonia and many more — with their true chemical formulas.