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63 - Europium lanthanide

Discovered by Eugène-Anatole Demarçay in 1901

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.
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
EuropiumEu Electron 1 Electron 2 Electron 1 Electron 2 Electron 3 Electron 4 Electron 5 Electron 6 Electron 7 Electron 8 Electron 1 Electron 2 Electron 3 Electron 4 Electron 5 Electron 6 Electron 7 Electron 8 Electron 9 Electron 10 Electron 11 Electron 12 Electron 13 Electron 14 Electron 15 Electron 16 Electron 17 Electron 18 Electron 1 Electron 2 Electron 3 Electron 4 Electron 5 Electron 6 Electron 7 Electron 8 Electron 9 Electron 10 Electron 11 Electron 12 Electron 13 Electron 14 Electron 15 Electron 16 Electron 17 Electron 18 Electron 19 Electron 20 Electron 21 Electron 22 Electron 23 Electron 24 Electron 25 Electron 1 Electron 2 Electron 3 Electron 4 Electron 5 Electron 6 Electron 7 Electron 8 Electron 1 Electron 2
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