NO. 058Lanthanide

Ce

Cerium

Cerium is a reactive lanthanide used in catalytic converters, glass polishing, and lighter flints.

Crystal Structure

β-Ce: Double hexagonal close-packed (dhcp)

Atomic Mass140.12 u

Density6.77 g/cm³

Melting Point1071 K

Boiling Point3716 K

Atomic Radius185 pm

Electronegativity1.12

Ionization Energy534 kJ/mol

Electron Affinity50 kJ/mol

Bonding TypeMetallic

Oxidation States3, 4

Acid/BaseBasic

ReactivityHigh

Electron Configuration

[Xe] 4f1 5d1 6s2

Discovered ByMartin Heinrich Klaproth

Year1803

Known Isotopes

Ce-136Ce-138Ce-140Ce-142