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Cerium is a chemical element; it has symbol Ce and atomic number 58, and is a soft, ductile, and silvery-white metal that tarnishes when exposed to air. Cerium is the second element in the lanthanide series, and while it often shows the oxidation state of +3 characteristic of the series, it also has a stable +4 state that does not oxidize water. It is…
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lanthanides ce used element oxide iv isotopes also metal stable known lanthanum oxidation lanthanide thorium praseodymium form ceria iii structure
| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| Cerium | 134Ce | synth | 1.00 | infobox |
| Cerium | 136Ce | 0.186% | 1.00 | infobox |
| Cerium | 138Ce | 0.251% | 1.00 | infobox |
| Cerium | 139Ce | synth | 1.00 | infobox |
| Cerium | 140Ce | 88.4% | 1.00 | infobox |
| Cerium | 141Ce | synth | 1.00 | infobox |
| Cerium | 142Ce | 11.1% | 1.00 | infobox |
| Cerium | 143Ce | synth | 1.00 | infobox |
| Cerium | 144Ce | synth | 1.00 | infobox |
| Cerium | Appearance | silvery white | 1.00 | infobox |
| Cerium | at T (K) | 1992 | 1.00 | infobox |
| Cerium | Atomic number (Z) | 58 | 1.00 | infobox |
| Cerium | Atomic radius | empirical: 181.8 pm | 1.00 | infobox |
| Cerium | Block | f-block | 1.00 | infobox |
| Cerium | Boiling point | 3716 K (3443 °C, 6229 °F) | 1.00 | infobox |
| Cerium | Brinell hardness | 186–412 MPa | 1.00 | infobox |
| Cerium | Bulk modulus | γ-Ce: 21.5 GPa | 1.00 | infobox |
| Cerium | CAS Number | 7440-45-1 | 1.00 | infobox |
| Cerium | Covalent radius | 204±9 pm | 1.00 | infobox |
| Cerium | Crystal structure | β-Ce: double hexagonal close-packed (dhcp) (hP4) | 1.00 | infobox |
| Cerium | Crystal structure | γ-Ce: face-centered cubic (fcc) (cF4) | 1.00 | infobox |
| Cerium | Density (at 20° C) | β-Ce: 6.689 g/cm3 γ-Ce: 6.769 g/cm3 | 1.00 | infobox |
| Cerium | Discovery | Martin Heinrich Klaproth, Wilhelm Hisinger, Jöns Jakob Berzelius (1803) | 1.00 | infobox |
| Cerium | Electrical resistivity | β-Ce, poly: 828 nΩ⋅m (at r.t.) | 1.00 | infobox |
| Cerium | Electron configuration | [Xe] 4f1 5d1 6s2 | 1.00 | infobox |
| Cerium | Electronegativity | Pauling scale: 1.12 | 1.00 | infobox |
| Cerium | Electrons per shell | 2, 8, 18, 19, 9, 2 | 1.00 | infobox |
| Cerium | First isolation | William Francis Hillebrand (1875) | 1.00 | infobox |
| Cerium | Group | f-block groups (no number) | 1.00 | infobox |
| Cerium | Heat of fusion | 5.46 kJ/mol | 1.00 | infobox |
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