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Cerium (Ce)
Atomic number 58 · Lanthanide
| Atomic number | 58 |
|---|---|
| Atomic mass | 140.116 u |
| Molar mass | 140.116 g/mol |
| Category | Lanthanide |
| Group / period / block | — / 6 / f |
| Electron configuration | [Xe] 4f 5d 6s2 |
| Electrons per shell | 2, 8, 18, 19, 9, 2 |
| Electronegativity (Pauling) | 1.12 |
| Atomic radius | 185.0 pm |
| Density | 6.77 g/cm³ |
| First ionisation energy | 5.5386 eV |
| Melting point | 1072.15 K (799.00 °C) |
| Boiling point | 3716.15 K (3443.00 °C) |
| Common oxidation states | +3, +4 |
| Abundance in Earth's crust | 66.5 ppm |
Uses
Lighter flints, glass polishing, catalysts
Discovery
1803, W. von Hisinger, J. Berzelius, M. Klaproth