Periodic Table of Elements

58

Cerium

140.12

Cerium was discovered in Sweden by Jöns Jakob Berzelius and Wilhelm Hisinger, and independently in Germany by Martin Heinrich Klaproth, both in 1803.

Name: Cerium
Symbol: Ce
Atomic number: 58
Atomic weight: 140.12
State: solid
Group, period, block: n/a, 6, f
Color: silvery white
Classification: lanthanide
Electron configuration: 4f1 5d1 6s2
2,8,18,19,9,2

Physical properties

Density: 6.770 g/cm-3
Melting point: 1068 K,795 C,1463 F
Boiling point: 3716 K,3443 C,6229 F

Atomic properties

Oxidation states: 4, 3, 2, 1
Electronegativity: 1.12 (Pauling scale)
Ionization energies: 1st: 534.4 kJmol-1
Covalent radius: 2049 pm
Van der Waals radius: no data
  • Ce
  • Electron Configuration

Isotopes

There are four naturally occurring isotopes of cerium exist, 136Ce, 138Ce, 140Ce, and 142Ce. About 88.48% of the cerium in nature is 140Ce.