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Cerium  SEE PERIODIC TABLE
see article  SEE FULL ARTICLE


Atomic Number58

Atomic SymbolCe

Atomic Weight140.115 amu

GroupRare Earth (Lanthanide Series)

FormSolid

Density @ STP6.770 g/cm3

Melting Point798 °C (1468.4 °F, 1071.15 °K)

Boiling Point3443 °C (6229.4 °F, 3716.15 °K)

Heat of Fusion5.46 kJ/mol

Heat of Vaporization350 kJ/mol

First Ionization Potential5.5387 eV

Electronegativity (on Pauling scale)1.12

Specific Heat Capacity0.192 J/g K

Ground State Electron Configuration4f1 5s2 5p6 5d1 6s2

Oxidation States+4

Stable Isotopes and Natural Abundance on Earth136Ce, 0.19%; 138Ce, 0.25%; 140Ce, 88.48%; 142Ce, 11.08%

Selected Radioisotopes139Ce, 141Ce, 144Ce

Crystal StructureHexagonal

Discovered byHisinger; Berzelius, 1803. Also, Klaproth, 1803

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