Ce
Cerium
Z 58 140.116 g/molLanthanide
Nucleus
58 Protons
82 Neutrons
58 Electrons (4 Valence)
Shell distribution: K2 • L8 • M18 • N19 • O9 • P2 • Q0
Electron Configuration
Energy
7p
6d
5f
7s
6p
5d
4f
6s
5p
4d
5s
4p
3d
4s
3p
3s
2p
2s
1s
[Xe]4f15d16s2
Oxidation States
CommonRare
0
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Radii
Empirical
185 pm1.85 Å
Calculated
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Covalent
204±9 pm2.04±0.09 Å
Van der Waals
235 pm2.35 Å
IonicCe3+
102 pm1.02 Å
Crystal Structure
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Face-centered cubicStandard state
Pearson symbol
cF4
Space group
Fm3m No. 225
Density
6.773 g/cm³