Gas that glows when condensed

Gas that glows when condensed : RADON

The element radon (Rn) is a radioactive gas, and a byproduct produced when uranium decays naturally in the earth. Radon gas can collect and accumulate in buildings and rooms that are particularly well insulated with very little air exchange. The danger is very real, as radon is listed as the second most frequent cause of lung cancer after cigarette smoke.

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