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| Ìfarahàn |
silvery white
250px |
| Àwọn ìní àníkárí |
| Orúkọ, àmì-ìdámọ̀, nọ́mbà |
americium, Am, 95 |
| Ìpè |
/ˌæməˈrɪsiəm/
AM-ə-RIS-ee-əm |
| Ẹ̀ka apilẹ̀sẹ̀ |
actinide |
| Àdìpọ̀, ìgbà, block |
n/a, 7, f |
| Ìwúwo átọ́mù |
(243) g·mol−1 |
| Ìtòjọ ẹ̀lẹ́ktrónì |
[Rn] 5f7 7s2 |
| Àwọn ẹ̀lẹ́ktrónì lórí ọ̀nà kan |
2, 8, 18, 32, 25, 8, 2 (Image) |
| Àwọn ìní aláfójúrí |
| Phase |
solid |
| Kíki (tó súnmọ́ r.t.) |
12 g·cm−3 |
| ojúàmì ìyọ́ |
1449 K, 1176 °C, 2149 °F |
| ajúàmì ìhó |
2880 K, 2607 °C, 4725 °F |
| Heat of fusion |
14.39 kJ·mol−1 |
| Specific heat capacity |
(25 °C) 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 |
(300 K) 10 W·m−1·K−1 |
| CAS registry number |
7440-35-9 |
| Most stable isotopes |
| Main article: Isotopes of americium |
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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]
