What Is Radon?
Radon is one of a group of gases called inert gases, and it is naturally radioactive. Learn more about radon, the heaviest of the inert gases, with help from a science teacher in this free video on physical science.
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Sciencing Staff. "What Is Radon?" sciencing.com, https://www.sciencing.com/what-is-radon-13585861/. 19 October 2017.
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Sciencing Staff. (2017, October 19). What Is Radon?. sciencing.com. Retrieved from https://www.sciencing.com/what-is-radon-13585861/
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Sciencing Staff. What Is Radon? last modified October 19, 2017. https://www.sciencing.com/what-is-radon-13585861/