Polonium

Polonium
84Po
Te ↑ Po ↓ Uuh Tábìlì ìdásìkò bismuth ← polonium → astatine
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
iso NA half-life DM DE (MeV) DP 208Po syn 2.898 y α 5.215 204Pb ε, β+ 1.401 208Bi 209Po syn 103 y α 4.979 205Pb ε, β+ 1.893 209Bi 210Po trace 138.376 d α 5.307 206Pb

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.