63Solid
Eu 151.964 Atomic mass · uLanthanides
Europium
Europium is a chemical element with symbol Eu and atomic number 63. It was isolated in 1901 and is named after the continent of Europe. It is a moderately hard, silvery metal which readily oxidizes in air and water.
Discovery 1901 (Eugène-Anatole Demarçay)
K2L8M18N25O8P2
Physical properties
Values for the element in its standard state.
- Density
- 5.244g/cm³
- Melting point
- 1,095K
- Boiling point
- 1,800K
- Atomic radius
- Not available
- Bonding type
- Metallic
- Molar heat
- 27.66J/(mol·K)
Inside the atom
Electron arrangement and the energy behind its behavior.
Full electron configuration
1s, 2 electrons; 2s, 2 electrons; 2p, 6 electrons; 3s, 2 electrons; 3p, 6 electrons; 3d, 10 electrons; 4s, 2 electrons; 4p, 6 electrons; 4d, 10 electrons; 5s, 2 electrons; 5p, 6 electrons; 4f, 7 electrons; 6s, 2 electrons;
[Xe] represents 54 core electrons. The full view shows them explicitly.
63 electrons Orbital order preserved from source
- Electronegativity
- 1.2Pauling scale
- First ionization energy
- 547kJ/mol
- Electron affinity
- 50kJ/mol
- Van der Waals radius
- Not available
Eu EuropiumAtomic number 63
547kJ/mol
Atomic numberGaps indicate unavailable data
About europium
- Appearance
- Not recorded
- Discovery
- 1901 (Eugène-Anatole Demarçay)
- Data source
- Read the reference
A missing value means it is unavailable in this reference dataset. Values can vary with measurement method and conditions.