58 Ce Cerium 140.12
Lanthanide
Cerium 铈
[Xe] 4f¹ 5d¹ 6s²
- Period 6
- Group —
- Block f
- Solid
Electron configuration
1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f¹ 5s² 5p⁶ 5d¹ 6s²
Orbital diagram (valence)
- Electrons per shell
- 2, 8, 18, 19, 9, 2
- Unpaired electrons
- 2
- Zeff (Slater)
- 3.00
Properties
- Atomic weight
- 140.12
- Electronegativity (Pauling)
- 1.12
- First ionization energy
- 534.4 kJ/mol
- Electron affinity
- 48.24 kJ/mol
- Covalent radius
- 204 pm
- van der Waals radius
- 235 pm
- Melting point
- 1071 K
- Boiling point
- 3697 K
- Density
- 6.77 g/cm³
- Melting / boiling point
- 797.9 °C / 3423.8 °C
- Common oxidation states
- +4, +3
- Discovered
- 1803
Cerium in the course
The lessons that discuss this element most (ranked by mentions).
Standard reduction potentials
| CeX4+(aq)+eX−CeX3+(aq) | +1.720 V |
All potentials Periodic trend
Data: PubChem periodic table (public domain); atomic weights are IUPAC abridged standard values; covalent radii from Cordero et al. (2008).