| Polonium |
|
84Po
|
|
|
| Ìhànsójú |
| silvery |
| Àwọn ìdámọ́ wíwọ́pọ̀ |
| Orúkọ, àmì-ìdámọ́, nọ́mbà |
polonium, Po, 84 |
| Ẹ̀ka ẹ́límẹ̀nti |
metalloid |
| Ẹgbẹ́, àsìkò, àdìpò |
16, 6, p |
| Ìwúwo átọ́mù |
(209) |
| Ìtòléra ẹ̀lẹ́ktrónì |
[Xe] 6s2 4f14 5d10 6p4
2, 8, 18, 32, 18, 6 |
| Physical properties |
| Phase |
solid |
| Density (near r.t.) |
(alpha) 9.196 g·cm−3 |
| Density (near r.t.) |
(beta) 9.398 g·cm−3 |
| Melting point |
527 K, 254 °C, 489 °F |
| Boiling point |
1235 K, 962 °C, 1764 °F |
| Heat of fusion |
ca. 13 kJ·mol−1 |
| Heat of vaporization |
102.91 kJ·mol−1 |
| Molar heat capacity |
26.4 J·mol−1·K−1 |
| Vapor pressure |
| P (Pa) |
1 |
10 |
100 |
1 k |
10 k |
100 k |
| at T (K) |
|
|
|
(846) |
1003 |
1236 |
|
| Atomic properties |
| Oxidation states |
6, 4, 2, -2
(amphoteric oxide) |
| Electronegativity |
2.0 (Pauling scale) |
| Ionization energies |
1st: 812.1 kJ·mol−1 |
| Atomic radius |
168 pm |
| Covalent radius |
140±4 pm |
| Van der Waals radius |
197 pm |
| Miscellanea |
| Crystal structure |
cubic
|
| Magnetic ordering |
nonmagnetic |
| Electrical resistivity |
(0 °C) (α) 0.40 µΩ·m |
| Thermal conductivity |
? 20 W·m−1·K−1 |
| Thermal expansion |
(25 °C) 23.5 µm·m−1·K−1 |
| CAS registry number |
7440-08-6 |
| Àwọn ísótòpù dídúró jùlọ |
| Main article: Àwọn ísótòpù polonium |
|
|
|
· r |
Polonium (pípè /pɵˈloʊniəm/, po-LOH-nee-əm) je ipilese kemika pelu ami-idamo Po ati nomba atomu 84, ti Marie Skłodowska-Curie ati Pierre Curie se awari ni 1898.
