Radon, Definition, Properties, Effects, & Facts
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Radon, chemical element, a heavy radioactive gas of Group 18 (noble gases) of the periodic table, generated by the radioactive decay of radium. It is a colorless gas, 7.5 times heavier than air and more than 100 times heavier than hydrogen. Learn more about radon in this article.
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Radon Definition, Facts, Symbol, Discovery, Properties, Uses
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Radon - Wikipedia
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Radon - Wikipedia
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