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Americium
Chemical Properties & Compounds
| Symbol | Atomic Number | Atomic Weight | Melting Point | Boiling Point | Phase | Density | Classification |
| Am | 95 | 243 | 1176 °C | 2607 °C | Solid | 13.6 g/cm3 | Metal   |
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| General |
| Name, Symbol, Number |
americium, Am, 95 |
| Chemical series |
actinides |
| Group, Period, Block |
n/a, 7, f |
| Appearance |
silvery white |
| Standard atomic weight |
(243) g·mol−1 |
| Electron configuration |
[Rn] 5f7 7s2 |
| Electrons per shell |
2, 8, 18, 32, 25, 8, 2 |
| Physical properties |
| Phase |
solid |
| Density (near r.t.) |
12 g·cm−3 |
| Melting point |
1449 K
(1176 °C, 2149 °F) |
| Boiling point |
2880 K
(2607 °C, 4725 °F) |
| Heat of fusion |
14.39 kJ·mol−1 |
| Heat capacity |
(25 °C) 62.7 J·mol−1·K−1 |
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|
| Atomic properties |
| Crystal structure |
hexagonal |
| Oxidation states |
6, 5, 4, 3
(amphoteric oxide) |
| Electronegativity |
1.3 (scale Pauling) |
| Ionization energies |
1st: 578 kJ/mol |
| Atomic radius |
175 pm |
| Miscellaneous |
| Magnetic ordering |
no data |
| Thermal conductivity |
(300 K) 10 W·m−1·K−1 |
| CAS registry number |
7440-35-9 |
| Selected isotopes |
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| References |
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Americium Compounds
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Source: Wikipedia article Americium
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Chemistry Quick Facts