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.
Compounds you can make with europium
Europium appears in one compound in our periodic table sandbox. Each one is a real substance with its true chemical formula — combine the right elements in the right ratio below to discover it.
-
Eu2O3
Europium(III) Oxide
The rare-earth oxide behind the red glow of old TV screens and fluorescent lamps.