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| Ìfarahàn |
| silvery |
| Àwọn ìní àníkárí |
| Orúkọ, àmì-ìdámọ̀, nọ́mbà |
actinium, Ac, 89 |
| Ẹ̀ka apilẹ̀sẹ̀ |
actinide |
| Àdìpọ̀, ìgbà, block |
n/a, 7, f |
| Ìwúwo átọ́mù |
(227) g·mol−1 |
| Ìtòjọ ẹ̀lẹ́ktrónì |
[Rn] 6d1 7s2 |
| Àwọn ẹ̀lẹ́ktrónì lórí ọ̀nà kan |
2, 8, 18, 32, 18, 9, 2 (Image) |
| Àwọn ìní aláfójúrí |
| Phase |
solid |
| Kíki (tó súnmọ́ r.t.) |
10 g·cm−3 |
| ojúàmì ìyọ́ |
(circa) 1323 K, 1050 °C, 1922 °F |
| ajúàmì ìhó |
3471 K, 3198 °C, 5788 °F |
| Heat of fusion |
14 kJ·mol−1 |
| Heat of vaporization |
400 kJ·mol−1 |
| Specific heat capacity |
(25 °C) 27.2 J·mol−1·K−1 |
| Atomic properties |
| Oxidation states |
3
(neutral oxide) |
| Electronegativity |
1.1 (Pauling scale) |
| Ionization energies |
1st: 499 kJ·mol−1 |
| 2nd: 1170 kJ·mol−1 |
| Covalent radius |
215 pm |
| Miscellanea |
| Crystal structure |
face-centered cubic |
| Magnetic ordering |
no data |
| Thermal conductivity |
(300 K) 12 W·m−1·K−1 |
| CAS registry number |
7440-34-8 |
| Most stable isotopes |
| Main article: Isotopes of actinium |
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Àktíníọ̀m tabi Actinium je is a radioactive apilese kemika alagbararadio to ni ami-idamo Ac ati nomba atomu 89, to je wiwari ni odun 1899.
