Periodic Table of Elements

63

Europium

151.96

Europium was discovered by French chemist Eugène-Anatole Demarçay in 1896 and he was able to isolate it in 1901.

Name: Europium
Symbol: Eu
Atomic number: 63
Atomic weight: 151.96
State: solid
Group, period, block: n/a, 6, f
Color: silvery white
Classification: lanthanide
Electron configuration: 4f7 6s2
2,8,18,25,8,2

Physical properties

Density: 5.264 g/cm-3
Melting point: 1099 K,826 C,1519 F
Boiling point: 1802 K,1529 C,2784 F

Atomic properties

Oxidation states: 3, 2, 1
Electronegativity: 1.2 (Pauling scale)
Ionization energies: 1st: 547.1 kJmol-1
Covalent radius: 1986 pm
Van der Waals radius: no data
  • Eu
  • Electron Configuration

Isotopes

There are two naturally occurring isotopes of europium exist, 151Eu, and 153Eu.