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        Radon
        	Radon - chemical symbol Rn, atomic number 86 - is a colorless, odorless and tasteless, chemical inert, radioactive and naturally occuring chemical element in the group of noble gases. Online available information resources about the chemistry and physics of radon and the radon compounds. Further information categories about related topics are listed in the 
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                | First Binding Measurement of RadonEven in trace quantities, the radioactive gas radon is very dangerous; it is second only to cigarette smoking as a cause of lung cancer deaths in the United States. The expense and precautions necessary to study it safely have limited research into its properties. Now, University of Pennsylvania chemists have for the first time measured how well radon binds to a molecule, paving the way for future research on it and other noble gases - [e]
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		| Radon, RnChemical and physical properties. Webelements, UK - [e]
 Radon, RnChemical and physical properties; comprehensive data. Environmental Chemistry, USA - [e]
 Radon, RnChemical and physical properties. Visual Elements, Chemsoc, UK - [e]
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		| National Radon Safety BoardNRSB seeks to encourage the highest standards of practice and integrity in radon services through the development of independent standards and procedures for certifying, approving and accrediting radon testers etc. - [e]
 Radon - SafetyNational Safety Council - [e]
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