Cerium

Lanthanide · 140.116 u · group 3, period 6

Cerium · Ce

Atomic number58

SymbolCe

CategoryLanthanide

Standard stateSolid

Group · Period · Block3 · 6 · f

Electron configuration[Xe]6s2 4f1 5d1

Atomic mass140.116 u

Atomic radius235 pm

Protons / Neutrons / Electrons58 / 82 / 58

Shells (e⁻ per shell)2, 8, 18, 19, 9, 2

Electronegativity (Pauling)1.12

Ionization energy5.539 eV

Electron affinity0.5 eV

Oxidation states+4, +3

Melting point1.07e+3 K · 797.9 °C

Boiling point3.70e+3 K · 3.42e+3 °C

Density6.77 g/cm³

Year discovered1803

CPK color

#FFFFC7

State at room temp (25 °C)

solid

Position