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|
Cerium
Chemical Properties & Compounds
| Symbol | Atomic Number | Atomic Weight | Melting Point | Boiling Point | Phase | Density | Classification |
| Ce | 58 | 140.116 | 795 °C | 3443 °C | Solid | 6.770 g/cm3 | Metal |
|
|
|
| General |
| Name, Symbol, Number |
cerium, Ce, 58 |
| Chemical series |
lanthanides |
| Group, Period, Block |
n/a, 6, f |
| Appearance |
silvery white
 |
| Standard atomic weight |
140.116(1) g·mol−1 |
| Electron configuration |
[Xe] 4f1 5d1 6s2 |
| Electrons per shell |
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 |
| Heat capacity |
(25 °C) 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 |
| Crystal structure |
cubic face centered |
| Oxidation states |
3, 4
(mildly basic oxide) |
| Electronegativity |
1.12 (scale Pauling) |
Ionization energies
(more) |
1st: 534.4 kJ·mol−1 |
| 2nd: 1050 kJ·mol−1 |
| 3rd: 1949 kJ·mol−1 |
| Atomic radius |
185 pm |
| Miscellaneous |
| Magnetic ordering |
no data |
| Electrical resistivity |
(r.t.) (β, poly) 828 nΩ·m |
| Thermal conductivity |
(300 K) 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 |
| 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 |
| Selected isotopes |
|
|
| References |
|
Cerium Compounds
|
Source: Wikipedia article Cerium
|
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Chemistry Quick Facts
