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.
Promethium, 61 Pm Promethium Pípè / p r oʊ ˈ m iː θ i ə m / (proh-MEE -thee-əm ) Ìhànsójú metallic nọ́mbà ìsújọ [145] Promethium ní orí tábìlì àyè
Nọ́mbà átọ̀mù (Z ) 61 Ẹgbẹ́ group n/a Àyè àyè 6 Àdìpọ̀ Àdìpọ̀-f Ẹ̀ka ẹ́límẹ́ntì Lanthanide Ìtò ẹ̀lẹ́ktrọ́nù [Xe ] 4f5 6s2 Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan 2, 8, 18, 23, 8, 2 Àwọn ohun ìní ara Ìfarahàn at STP solid Ìgbà ìyọ́ 1315 K (1042 °C, 1908 °F) Ígbà ìhó 3273 K (3000 °C, 5432 °F) Kíki (near r.t. ) 7.26 g/cm3 Heat of fusion 7.13 kJ/mol Heat of 289 kJ/mol Atomic properties Oxidation states +2, +3 Àdàkọ:Infobox element/symbol-to-oxidation-state/comment Electronegativity Pauling scale: ? 1.13 Atomic radius empirical: 183 pm Covalent radius 199 pm Color lines in a spectral range Spectral lines of promethiumOther properties Natural occurrence primordial Crystal structure hexagonal Thermal expansion (r.t. ) (α, poly) est. 11 µm/(m·K) Thermal conductivity 17.9 W/(m·K) Electrical resistivity (r.t. ) est. 0.75 µ Ω·m Magnetic ordering paramagnetic [1] 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 Number 7440-12-2 Main isotopes of promethium
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