NO. 063Lanthanide

Eu

Europium

Europium is the most reactive lanthanide and is widely used in phosphors for red and blue display lighting.

Crystal Structure

Body-centered cubic (bcc)

Atomic Mass151.96 u

Density5.24 g/cm³

Melting Point1099 K

Boiling Point1802 K

Atomic Radius199 pm

Electronegativity1.2

Ionization Energy547 kJ/mol

Electron Affinity50 kJ/mol

Bonding TypeMetallic

Oxidation States2, 3

Acid/BaseBasic

ReactivityHigh

Electron Configuration

[Xe] 4f7 6s2

Discovered ByEugène-Anatole Demarçay

Year1901

Known Isotopes

Eu-151Eu-153