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Polonium,84PoPolonium |
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Pípè | /pəˈləʊniəm/(pə-LOH-nee-əm) |
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Ìhànsójú | silvery |
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nọ́mbà ìsújọ | [209] |
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Polonium ní orítábìlì àyè |
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Nọ́mbà átọ̀mù(Z) | 84 |
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Ẹgbẹ́ | group 16 (chalcogens) |
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Àyè | àyè 6 |
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Àdìpọ̀ | Àdìpọ̀-p |
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Ẹ̀ka ẹ́límẹ́ntì | Post-transition metal |
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Ìtò ẹ̀lẹ́ktrọ́nù | [Xe] 4f145d106s26p4 |
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Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan | 2, 8, 18, 32, 18, 6 |
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Àwọn ohun ìní ara |
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ÌfarahànatSTP | solid |
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Ìgbà ìyọ́ | 527K(254 °C, 489 °F) |
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Ígbà ìhó | 1235 K (962 °C, 1764 °F) |
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Kíki(nearr.t.) | ( Alpha ) 9.196 g/cm3 (beta) 9.398 g/cm3 |
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Heat of fusion | ca. 13kJ/mol |
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Heat of | 102.91 kJ/mol |
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Molar heat capacity | 26.4 J/(mol·K) |
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pressure
P(Pa)
|
1
|
10
|
100
|
1 k
|
10 k
|
100 k
|
atT(K)
|
|
|
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(846)
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1003
|
1236
|
|
Atomic properties |
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Oxidation states | −2,+2,+4,+5,[1]+6Àdàkọ:Infobox element/symbol-to-oxidation-state/comment |
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Electronegativity | Pauling scale: 2.0 |
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Atomic radius | empirical: 168pm |
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Covalent radius | 140±4 pm |
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Van der Waals radius | 197pm |
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Color lines in a spectral rangeSpectral linesof polonium |
Other properties |
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Natural occurrence | from decay |
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Crystal structure | cubic |
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Thermal expansion | 23.5 µm/(m·K) (at 25 °C) |
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Thermal conductivity | ?20 W/(m·K) |
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Electrical resistivity | (α) 0.40 µ Ω·m (at 0 °C) |
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Magnetic ordering | nonmagnetic |
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CAS Number | 7440-08-6 |
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Mainisotopes of polonium |
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Àdàkọ:Category-inline |references |
Polonium(pípè/pɵˈloʊniəm/,po-LOH-nee-əm) jeipilese kemikapelu ami-idamoPoatinomba atomu84, tiMarie Skłodowska-CurieatiPierre Curiese awari ni 1898.