59PrPraseodymium140.907662[Xe] 4f³ 6s²
lanthanide
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.
A stylized shell model. Electrons are quantum objects, not particles following these literal paths. Sizes and motion are illustrative.
Electrons by shell
Electron configuration
4f3
6s2
54 is the [Xe] core total across five shells.
At a glance
- Atomic number
- 59
- Atomic mass
- 140.907662 u
- Phase
- Solid
- Density
- 6.77 g/cm³
- Melting point
- 1,208 K
- Boiling point
- 3,403 K
- First ionization energy
- 527 kJ/mol
- Electronegativity
- 1.13
- Electron affinity
- 93 kJ/mol
- Molar heat capacity
- 27.2 J/(mol·K)
- Period
- 6
- Appearance
- grayish white
Conditions and isotopes affect measured properties. Some properties of short-lived elements are predicted. Electronegativity uses the Pauling scale.
Keep exploring
Explore the stories, imagery, and reference data in more depth. Properties with no value in the reference are marked unavailable.