Europium

Lanthanide · 151.964 u · group 3, period 6

Europium · Eu

Atomic number63

SymbolEu

CategoryLanthanide

Standard stateSolid

Group · Period · Block3 · 6 · f

Electron configuration[Xe]6s2 4f7

Atomic mass151.964 u

Atomic radius233 pm

Protons / Neutrons / Electrons63 / 89 / 63

Shells (e⁻ per shell)2, 8, 18, 25, 8, 2

Electronegativity (Pauling)—

Ionization energy5.67 eV

Electron affinity—

Oxidation states+3, +2

Melting point1.10e+3 K · 821.9 °C

Boiling point1.80e+3 K · 1.53e+3 °C

Density5.24 g/cm³

Year discovered1901

CPK color

#61FFC7

State at room temp (25 °C)

solid

Position