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atomic number 7
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atomic number 83
-- atomic number 84 --
atomic number 85
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atomic number 84

Noun1.atomic number 84 - a radioactive metallic element that is similar to tellurium and bismuth; occurs in uranium ores but can be produced by bombarding bismuth with neutrons in a nuclear reactor
Synonyms: Po, polonium
metal, metallic element, Po, polonium

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