Template:Infobox polonium

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84 bismuth ← polonium → astatine Te ↑ Po ↓ Uuh Periodic Table - Extended Periodic Table
General
Name, Symbol, Number	polonium, Po, 84
Chemical series	metalloids
Group, Period, Block	16, 6, p
Appearance	silvery
Standard atomic weight	(209)  g·mol−1
Electron configuration	[Xe] 6s2 4f14 5d10 6p4
Electrons per shell	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
Specific heat capacity	(25 °C) 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
Crystal structure	cubic
Oxidation states	4, 2 (amphoteric oxide)
Electronegativity	2.0 (Pauling scale)
Ionization energies	1st: 812.1 kJ/mol
Atomic radius	190  pm
Atomic radius (calc.)	135  pm
Miscellaneous
Magnetic ordering	nonmagnetic
Electrical resistivity	(0 °C) (α) 0.40 µΩ·m
Thermal conductivity	(300 K)  ? 20  W·m−1·K−1
Thermal expansion	(25 °C) 23.5  µm·m−1·K−1
CAS registry number	7440-08-6
Selected isotopes
Main article: Isotopes of infobox 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 syn 138.376 d α 5.407 206Pb
References