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'''Radon''' is a [[noble gas]]. It is not to be confused with [[radium]], an [[alkali earth metal]].

'''Radon''' is a [[noble gas]]. It is not to be confused with [[radium]], an [[alkali earth metal]]. The atomic weight of Radon-222, the most common isotope, is 222.0175777.

Radon is a radioactive gas which comes from the decay of uranium in the ground. The [[EPA]] claims that it is a health hazard and causes cancer in people and animals exposed to it, though many [[conservative]] commentators and some industrial hygienists<ref>Connell, C.P. ''Radon: Truth vs. myth''; Forensic Applications Consulting Technologies, Inc. [http://www.forensic-applications.com/radon/radon.html]</ref> state that the dangers are significantly exaggerated.

Radon is a radioactive gas which comes from the decay of uranium in the ground. The [[EPA]] claims that it is a health hazard and causes cancer in people and animals exposed to it, though many [[conservative]] commentators and some industrial hygienists<ref>Connell, C.P. ''Radon: Truth vs. myth''; Forensic Applications Consulting Technologies, Inc. [http://www.forensic-applications.com/radon/radon.html]</ref> state that the dangers are significantly exaggerated.