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Plutonium
Chemical Properties & Compounds
| Symbol | Atomic Number | Atomic Weight | Melting Point | Boiling Point | Phase | Density | Classification |
| Pu | 94 | 244 | 639.4 °C | 3228 °C | Solid | 19.816 g/cm3 | Metal   |
|
|
|
| General |
| Name, Symbol, Number |
plutonium, Pu, 94 |
| Chemical series |
actinides |
| Group, Period, Block |
n/a, 7, f |
| Appearance |
silvery white
 |
| Standard atomic weight |
(244) g·mol−1 |
| Electron configuration |
[Rn] 5f6 7s2 |
| Electrons per shell |
2, 8, 18, 32, 24, 8, 2 |
| Physical properties |
| Phase |
solid |
| Density (near r.t.) |
19.816 g·cm−3 |
| Liquid density at m.p. |
16.63 g·cm−3 |
| Melting point |
912.5 K
(639.4 °C, 1182.9 °F) |
| Boiling point |
3505 K
(3228 °C, 5842 °F) |
| Heat of fusion |
2.82 kJ·mol−1 |
| Heat of vaporization |
333.5 kJ·mol−1 |
| Heat capacity |
(25 °C) 35.5 J·mol−1·K−1 |
Vapor pressure
| P(Pa) |
1 |
10 |
100 |
1 k |
10 k |
100 k |
| at T(K) |
1756 |
1953 |
2198 |
2511 |
2926 |
3499 |
|
| Atomic properties |
| Crystal structure |
monoclinic |
| Oxidation states |
6, 5, 4, 3
(amphoteric oxide) |
| Electronegativity |
1.28 (scale Pauling) |
| Ionization energies |
1st: 584.7 kJ/mol |
| Atomic radius |
175 pm |
| Miscellaneous |
| Magnetic ordering |
no data |
| Electrical resistivity |
(0 °C) 1.460 µΩ·m |
| Thermal conductivity |
(300 K) 6.74 W·m−1·K−1 |
| Thermal expansion |
(25 °C) 46.7 µm·m−1·K−1 |
| Speed of sound (thin rod) |
(20 °C) 2260 m/s |
| Young's modulus |
96 GPa |
| Shear modulus |
43 GPa |
| Poisson ratio |
0.21 |
| CAS registry number |
7440-07-5 |
| Selected isotopes |
|
|
| References |
|
Plutonium Compounds
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Source: Wikipedia article Plutonium
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Chemistry Quick Facts
