63 Eu 151.96
Europium
Lanthanide
Europium (Eu) is a chemical element with atomic number 63, classified as a lanthanide. At room temperature it is a solid. It was discovered in 1901 by Eugène-Anatole Demarçay.
Properties
- Atomic number
- 63
- Atomic mass
- 151.96 u
- Category
- Lanthanide
- Group
- 0
- Period
- 6
- Block
- f-block
- Electron configuration
- [Xe] 4f⁷ 6s²
- Phase at STP
- Solid
- Density
- 5.243 g/cm³
- Melting point
- 1099 K (825.9 °C)
- Boiling point
- 1802 K (1528.8 °C)
- Electronegativity
- 1.2
- Atomic radius
- 231 pm
- Ionization energy
- 5.67 eV
- Discovery
- 1901 · Eugène-Anatole Demarçay
Common uses
Phosphors, lasers, nuclear reactors, euro banknotes
Did you know?
Creates red and blue colors in TV screens and prevents counterfeiting.