Title : Environmental Health Effects of
نویسنده
چکیده
Radon is a gas with symbol Rn and atomic number 86. It’s an active, colorless, odorless, tasteless gas formed from decaying of uranium. It is one of the densest gas, and also a health hazard due to its radioactivity. Uranium is the parent compound from which radon is formed. Uranium has been there since the earth was formed. Thus it will be present for millions of years in the same concentration as now. Uranium is present in various rocks, soil and water. The natural sources of Uranium are granite, phosphate, shale and pitchblende. Uranium 238, decays into Thorium 230, which further decays into Radium 226 and finally into Radon 222. Radon further decays into lead. Radon has 3 isotopes, Radon 222, Actinon and Thoron. Thoron and Actinon have relatively shorter half lives in seconds and hence have limited radioactivity hazards. Radon 222 is the most stable with half life of 3.8 days. (EPA, 2013)
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