59
Pr
Praseodymium
Lanthanide period 6 f-block discovered: 1885
As a chemical element
Properties of the atom — they do not depend on what substance it is part of.
- Atomic number
- 59
- Atomic mass
- 140.90766 a.m.u.
- Electron configuration
- [Xe]6s2 4f3
- Electronegativity
- 1.13 on the Pauling scale
- Atomic radius
- 239 pm
- Ionization energy
- 5.464 eV
- Oxidation states
- +3
As a simple substance
Properties of the substance these atoms form under ordinary conditions.
- State at 25 °C
- Solid
- Melting point
- 1204 K (930,85 °C)
- Boiling point
- 3793 K (3 519,85 °C)
- Density
- 6.77 g/cm³