59Pr140.91
Praseodymium
LanthanidesRare-earth metals used in strong magnets, phone screens and lasers.
[Xe] 4f³ 6s²
- Atomic number
- 59
- Atomic mass
- 140.91
- Protons
- 59
- Neutrons
- 82 (most common)
- Electrons
- 59
- Shells
- 2, 8, 18, 21, 8, 2
- State at 25 °C
- Solid
- Position
- Period 6, f-block
Proton (+)Neutron (0)Electron (−)
Discovered byCarl Auer von Welsbach, 1885Carl Auer von Welsbach: 2 elements
He split a substance called didymium into two elements. This one's name means “green twin”.
Did you know?
- Its salts are green.
- Didymium glass filters out the bright yellow glare of hot glass.
Where it's found
- Rare-earth ores
What it's used for
- Strong magnets
- Aircraft engine alloys
- Welders' and glassblowers' goggles
Try it
There's no safe home experiment for Praseodymium. Explore it with the animated atom above instead.