63
Eu
Europium
Lanthanide period 6 f-block discovered: 1901
As a chemical element
Properties of the atom — they do not depend on what substance it is part of.
- Atomic number
- 63
- Atomic mass
- 151.964 a.m.u.
- Electron configuration
- [Xe]6s2 4f7
- Atomic radius
- 233 pm
- Ionization energy
- 5.670 eV
- Oxidation states
- +3, +2
As a simple substance
Properties of the substance these atoms form under ordinary conditions.
- State at 25 °C
- Solid
- Melting point
- 1095 K (821,85 °C)
- Boiling point
- 1802 K (1 528,85 °C)
- Density
- 5.24 g/cm³