Uranium FAQ > R > Radon (Rn)
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A heavy radioactive gas given off by rocks containing radium (or thorium). Rn-222 is the main isotope.
Last updated on March 12, 2010 by Rich Boberg
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A heavy radioactive gas given off by rocks containing radium (or thorium). Rn-222 is the main isotope.
Last updated on March 12, 2010 by Rich Boberg