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Radon Isotope Crossword Clue

There is 1 exact and 83 possible answers.
We've checked our database and believe the answer is THORON which was last seen in the New York Times crossword.
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We think the answer to this crossword clue is: THORON

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31%5 Main source of indoor radon exposure
noun

• a radioactive gaseous element formed by the disintegration of radium; the heaviest of the inert gasses; occurs naturally (especially in areas over granite) and is considered a hazard to health

31%9 Mineral that is a major source of radon gas
noun

• a mineral consisting of uranium oxide and trace amounts of radium and thorium and polonium and lead and helium; uraninite in massive form is called pitchblende which is the chief uranium ore

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Clue Last Found In...

Source #Number Answer
New York Times05 Feb 1995 Down 40
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