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  • Elements

    [ 209 ]

    Name: poloniumGroup number: 16
    Symbol: PoGroup name: Chalcogen
    Atomic number: 84Period number: 6
    Atomic weight: [ 209 ]Block: p-block
    CAS Registry ID: 7440-08-6Voice:
    Standard state: solid at 298 KColour: silvery
    Classification: MetallicAvailability:

    Image adapted with permission from Prof James Marshall"s (U. North Texas, USA) Walking Tour of the elements CD.

    Polonium has more isotopes than any other element, all of which are radioactive. Polonium dissolves readily in dilute acids, but is only slightly soluble in alkalis.

    Weight for weight it is about 2.5 x 1011 times as toxic as hydrocyanic acid (HCN). Polonium has been found in tobacco as a contaminant and in uranium ores.


    Here is a brief summary of the isolation of polonium.

    Polonium is radioactive and excessivley rare in nature. It is made in very small qunatities through a nuclear reaction of bismuth. Neutron irradiation of 209bismuth (atomic number 83) gives 210polonium (atomic number 84).

    209Bi + 1n 210Po + e-

    Metallic polonium can be fractionally distilled from the bismuth or electrodeposited onto a metal surface such as silver.

    none listed
  • PoCl2
  • PoCl4
  • Bromides
  • PoBr2
  • PoBr4
  • Iodides
  • PoI2
  • PoI4
  • Hydrides
  • PoH2
  • Oxides
  • PoO2
  • Sulfides
    none listed
    none listed
    none listed
    none listed

    Our data and resources are taken from Web Elements