| Americium |
|
95Am
|
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|
| Ìhànsójú |
silvery white
250px |
| Àwọn ìdámọ́ wíwọ́pọ̀ |
| Orúkọ, àmì-ìdámọ́, nọ́mbà |
americium, Am, 95 |
| Ìpèlóhùn |
/ˌæməˈrɪsiəm/
AM-ə-RIS-ee-əm |
| Ẹ̀ka ẹ́límẹ̀nti |
actinide |
| Ẹgbẹ́, àsìkò, àdìpò |
n/a, 7, f |
| Ìwúwo átọ́mù |
(243) |
| Ìtòléra ẹ̀lẹ́ktrónì |
[Rn] 5f7 7s2
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 |
| Molar heat capacity |
62.7 J·mol−1·K−1 |
| Vapor pressure |
| P (Pa) |
1 |
10 |
100 |
1 k |
10 k |
100 k |
| at T (K) |
1239 |
1356 |
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| Atomic properties |
| Oxidation states |
6, 5, 4, 3, 2
(amphoteric oxide) |
| Electronegativity |
1.3 (Pauling scale) |
| Ionization energies |
1st: 578 kJ·mol−1 |
| Atomic radius |
173 pm |
| Covalent radius |
180±6 pm |
| Miscellanea |
| Crystal structure |
hexagonal
|
| Magnetic ordering |
no data |
| Thermal conductivity |
10 W·m−1·K−1 |
| CAS registry number |
7440-35-9 |
| Àwọn ísótòpù dídúró jùlọ |
| Main article: Àwọn ísótòpù americium |
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· r |
Amẹrísíọ̀m tabi Americium je apilese alasopapo to ni ami-idamo Am ati nomba atomu 95. Gege bi apilese onide alagbararadio, americium je aktinidi ti o je bibosowo Glenn T. Seaborg ni 1944 nigba to n digbolu plutonium pelu awon neutroni be sini o je apilese teyinuraniom kerin to je wiwari. Won soloruko fun orile Amerika, ni ibaramu mo europium.[1]
