View source for Radon

* A radioactive element that is one of the heaviest gases known. Its atomic number is 86. It is a daughter of radium. <br/>Source: U.S. Nuclear Regulatory Commission
* A colorless naturally occurring, radioactive, inert gas formed by radioactive decay of radium atoms in soil or rocks. <br/>Source: [http://www.epa.gov/OCEPAterms/ Terms of the Environment]
* A radioactive gas that is released by uranium, a substance found in soil and rock. Breathing in too much radon can damage lung cells and lead to lung cancer.

[[Category: Cancer]]
[[Category: Chemistry]]
[[Category: Environment]]