63 - Europium lanthanide
Discovered by Eugène-Anatole Demarçay in 1901
- Atomic Radius (Å)
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.
Shell | Electrons | Orbitals |
---|---|---|
1 | 2 | 2 in 1s |
2 | 8 | 2 in 2s + 6 in 2p |
3 | 18 | 2 in 3s + 6 in 3p + 10 in 3d |
4 | 25 | 2 in 4s + 6 in 4p + 10 in 4d + 7 in 4f |
5 | 8 | 2 in 5s + 6 in 5p |
6 | 2 | 2 in 6s |
151.96 u
Atomic Mass
2.6 Å
Atomic Radius
1802 K
Boiling Point
1.98 Å
Covalent Radius
5.26 g/cm³
Density
11.2
Electron Affinity
1.2
Electronegativity
5.67 eV
First Ionization Energy
1095.15 K
Melting Point
6
Number of Shells
63
Atomic Number
2, 8, 18, 25, 8, 2
Electron Shell Occupations