Polonium Po
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Electron 1
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Electron 18
Electron 1
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Electron 32
Electron 1
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Electron 18
Electron 1
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Electron 6
Polonium 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.
84
Atomic Number
209 u
Atomic Mass
527.15 K
Melting Point
1235 K
Boiling Point
9.2 g/cm³
Density
1.5 Å
Atomic Radius
1.4 Å
Covalent Radius
2
Electronegativity
8.42 eV
First Ionization Energy
136
Electron Affinity
6
Number of Shells
6
Electron Valency
2, 8, 18, 32, 18, 6
Electron Shell Occupations
null J/g
Specific Heat