| Cerium |
|
58Ce
|
|
|
| Ìhànsójú |
silvery white
 |
| Àwọn ìdámọ́ wíwọ́pọ̀ |
| Orúkọ, àmì-ìdámọ́, nọ́mbà |
cerium, Ce, 58 |
| Ẹ̀ka ẹ́límẹ̀nti |
lanthanide |
| Ẹgbẹ́, àsìkò, àdìpò |
n/a, 6, f |
| Ìwúwo átọ́mù |
140.116 |
| Ìtòléra ẹ̀lẹ́ktrónì |
[Xe] 4f2 6s2
2, 8, 18, 19, 9, 2 |
| Physical properties |
| Phase |
solid |
| Density (near r.t.) |
6.770 g·cm−3 |
| Liquid density at m.p. |
6.55 g·cm−3 |
| Melting point |
1068 K, 795 °C, 1463 °F |
| Boiling point |
3716 K, 3443 °C, 6229 °F |
| Heat of fusion |
5.46 kJ·mol−1 |
| Heat of vaporization |
398 kJ·mol−1 |
| Molar heat capacity |
26.94 J·mol−1·K−1 |
| Vapor pressure |
| P (Pa) |
1 |
10 |
100 |
1 k |
10 k |
100 k |
| at T (K) |
1992 |
2194 |
2442 |
2754 |
3159 |
3705 |
|
| Atomic properties |
| Oxidation states |
4, 3, 2
(mildly basic oxide) |
| Electronegativity |
1.12 (Pauling scale) |
| Ionization energies |
1st: 534.4 kJ·mol−1 |
| 2nd: 1050 kJ·mol−1 |
| 3rd: 1949 kJ·mol−1 |
| Atomic radius |
181.8 pm |
| Covalent radius |
204±9 pm |
| Miscellanea |
| Crystal structure |
face-centered cubic
|
| Magnetic ordering |
paramagnetic[1] |
| Electrical resistivity |
(r.t.) (β, poly) 828 nΩ·m |
| Thermal conductivity |
11.3 W·m−1·K−1 |
| Thermal expansion |
(r.t.) (γ, poly) 6.3 µm/(m·K) |
| Speed of sound (thin rod) |
(20 °C) 2100 m·s−1 |
| Young's modulus |
(γ form) 33.6 GPa |
| Shear modulus |
(γ form) 13.5 GPa |
| Bulk modulus |
(γ form) 21.5 GPa |
| Poisson ratio |
(γ form) 0.24 |
| Mohs hardness |
2.5 |
| Vickers hardness |
270 MPa |
| Brinell hardness |
412 MPa |
| CAS registry number |
7440-45-1 |
| Àwọn ísótòpù dídúró jùlọ |
| Main article: Àwọn ísótòpù cerium |
|
|
|
· r |
Cerium (pípè /ˈsɪəriəm/) je apilese kemika to ni ami-idamo Ce ati nomba atomu 58.
