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| Ìfarahàn |
| metallic |
| Àwọn ìní àníkárí |
| Orúkọ, àmì-ìdámọ̀, nọ́mbà |
promethium, Pm, 61 |
| Ẹ̀ka apilẹ̀sẹ̀ |
lanthanide |
| Àdìpọ̀, ìgbà, block |
n/a, 6, f |
| Ìwúwo átọ́mù |
[145] g·mol−1 |
| Ìtòjọ ẹ̀lẹ́ktrónì |
[Xe] 4f5 6s2 |
| Àwọn ẹ̀lẹ́ktrónì lórí ọ̀nà kan |
2, 8, 18, 23, 8, 2 (Image) |
| Àwọn ìní aláfójúrí |
| Phase |
solid |
| Kíki (tó súnmọ́ r.t.) |
7.26 g·cm−3 |
| ojúàmì ìyọ́ |
1315 K, 1042 °C, 1908 °F |
| ajúàmì ìhó |
3273 K, 3000 °C, 5432 °F |
| Heat of fusion |
7.13 kJ·mol−1 |
| Heat of vaporization |
289 kJ·mol−1 |
| Atomic properties |
| Oxidation states |
3 (mildly basic oxide) |
| Electronegativity |
? 1.13 (Pauling scale) |
| Ionization energies |
1st: 540 kJ·mol−1 |
| 2nd: 1050 kJ·mol−1 |
| 3rd: 2150 kJ·mol−1 |
| Atomic radius |
183 pm |
| Covalent radius |
199 pm |
| Miscellanea |
| Crystal structure |
hexagonal |
| Magnetic ordering |
paramagnetic[1] |
| Electrical resistivity |
(r.t.) est. 0.75 µΩ·m |
| Thermal conductivity |
(300 K) 17.9 W·m−1·K−1 |
| Thermal expansion |
(r.t.) (α, poly)
est. 11 µm/(m·K) |
| Young's modulus |
(α form) est. 46 GPa |
| Shear modulus |
(α form) est. 18 GPa |
| Bulk modulus |
(α form) est. 33 GPa |
| Poisson ratio |
(α form) est. 0.28 |
| CAS registry number |
7440-12-2 |
| Most stable isotopes |
| Main article: Isotopes of promethium |
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Promethium (pípè /prɵˈmiːθiəm/, pro-MEE-thee-əm) je apilese kemika to ni ami-idamo Pm ati nomba atomu 61. O yato si awon apilese yioku nitori pe oun nika ni apilese radioalagbara leyin technetium to je titele pelu awon apilese kemika ti awon isotopu won duro sinsin.
