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In the year of 1900 Radon was discovered by Friedrich Ernst Dorn.
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Sir William Ramsay determined the atomic weight of radon and decided to put it on the Periodic Table.
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In 1918 a scientist named Schimdt
proposed the name "radon" from "radium". -
Testing for radon began in uranium mines, then later begun in homes during the 1980's.
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