59 Pr 140.908
Praseodymium
lanthanide
Properties
- Atomic number
- 59
- Atomic mass
- 140.908 u
- Category
- lanthanide
- Group
- f-block
- Period
- 6
- Block
- f-block
- State (room temp)
- Solid
- Outer-shell electrons
- 2
- Electronegativity
- 1.13 (Pauling)
- Density
- 6.77 g/cm³
- Melting point
- 934.85 °C
- Boiling point
- 3129.85 °C
Electron configuration
1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f³
Noble-gas shorthand: [Xe] 4f³ 6s²
Electrons per shell: 2, 8, 18, 21, 8, 2 — that's 2 in the outermost shell.
About Praseodymium
Praseodymium is a chemical element with symbol Pr and atomic number 59. Praseodymium is a soft, silvery, malleable and ductile metal in the lanthanide group. It is valued for its magnetic, electrical, chemical, and optical properties.
- Discovered by Carl Auer von Welsbach
- Appearance: grayish white
Position in the periodic table
Data compiled from Wikipedia, PubChem, and IUPAC. Source.