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84Po209.000
Polonium
Post-Transition MetalPolonium is a chemical element with symbol Po and atomic number 84, discovered in 1898 by Marie Curie and Pierre Curie. A rare and highly radioactive element with no stable isotopes, polonium is chemically similar to bismuth and tellurium, and it occurs in uranium ores. Applications of polonium are few.
Phase: SolidAppearance: silvery
2, 8, 18, 32, 18, 6
Physical Properties
Atomic Mass209 u
Density9.196 g/cm³
Melting Point527 K
Boiling Point1235 K
Molar Heat26.4 J/(mol·K)
Period6
PhaseSolid
Chemical Properties
Electron Configuration1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p4
Semantic Config[Xe] 4f14 5d10 6s2 6p4
Shells2, 8, 18, 32, 18, 6
Electron Affinity136 kJ/mol
Electronegativity2
Ionization Energies
IE1: 812.1 kJ/mol
Discovery
Discovered byPierre Curie