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58Ce140.116
Cerium
LanthanidesBlock fPeriod 6solid at 20 °C
Configuration :[Xe] 4f¹ 5d¹ 6s²
Atomic mass :140.116 u
French :Cérium
3D Bohr-model representation of the Cerium atom (symbol Ce, atomic number Z=58). Electron shell configuration: 2, 8, 18, 19, 9, 2 electrons.
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Bohr model · educational
Electron configuration
Full[Xe] 4f¹ 5d¹ 6s²
Short[Xe] 4f¹ 5d¹ 6s²
Valence electrons4
KLMNOPQ shells
K2
L8
M18
N19
O9
P2
Electronegativity
Pauling1.12
Allen—
Mulliken (eV)—
Atomic radii
Empirical185 pm
Calculated210 pm
Covalent204 pm
Van der Waals—
Ionic radii (Shannon-Prewitt)
+3101 pm
+487 pm
Successive ionisation energies
I₁534.4 kJ/mol
I₂1050 kJ/mol
I₃1949 kJ/mol
I₄3547 kJ/mol
Electron affinity—
Oxidation states
+2+3+4
Bold states = most common.