Polonyo

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Polonium
84Po
Te ↑ Po ↓ Lv Periodic table bismuth ← polonium → astatine
Panagway
silvery Payl:Polonium.jpg
Kinatibuk-ang mga kinaiya
Ngalan, simbolo, kaiphan	polonium, Po, 84
Paglitok	/[unsupported input]poʊˈloʊniəm/ [[Help:Pronunciation respelling key|po-Plantilya:Smallcaps all-nee-əm]]
Kategoriyang elemento	post-transition metal post-transition metal status is disputed (see article text)
Group, period, block	16, 6, p
Gibug-aton sa atomo	(209)
Kontorno sa elektron	[Xe] 6s2 4f14 5d10 6p4 2, 8, 18, 32, 18, 6
History
Pagkadiskobre	Pierre Curie and Marie Curie (1898)
First isolation	Willy Marckwald (1902)
Physical properties
Phase	magahi
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
Most stable isotopes
Main article: Isotopes of polonium
iso NA half-life DM DE (MeV) DP 208Po syn 2.898 y α 5.215 204Pb β+ 1.401 208Bi 209Po syn 103 y α 4.979 205Pb β+ 1.893 209Bi 210Po trace 138.376 d α 5.307 206Pb
v t e · r

Ang polonyo (Iningles polonium) mao ang elementong kimiko sa talaang peryodiko nga may simbolo nga Po ug kaiphan nga atomik 84. Ang polonyo mao ang puthaw.