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- W2739887402 abstract "Radon is a radioactive noble gas that occurs naturally but becomes an environmental hazard when it remains concentrated in enclosed places such as houses, caves and mines. Rocks and soils containing uranium produce radon during radioactive decay process. Being a gas, radon diffuses through soils and rocks and enters the atmosphere. Radon is water soluble and may contaminate drinking water supplies. Uranium miners and residents of houses built on uranium bearing rocks or soils are exposed to high concentrations of radon. Continuous exposure to radon causes lung cancer in human beings. Chemistry of Radon Radon is widely dispersed in the environment. It is highly radioactive and decays by the emission of energetic α particles. Radon is the heaviest of the noble or chemically inert gases. Its chemical inertness is due to its stable electronic configuration [5s 2 5p 6 5d 10 6s 2 6p 6 ]. The natural radioactive series beginning with 238 U is the major source of natural radiation in the environment. Each 238 U nucleus emits an α particle, and thereby an atom of the thorium isotope ( 234 Th) is formed. In the sequence of reactions, 206 Pb is formed, which is non-radioactive (stable) and therefore stops the sequence. Of particular interest is the portion of the 14-step sequence of 238 U radioactive decay series, which involves the formation of gaseous radon, which is mobile. Radon isotope 222 has a half-life of 3.8 days, long enough to diffuse into the atmosphere through the solid rock or soil in which it is formed. Radon is found in natural sources only because of its continuous replenishment from the radioactive decay of longer lived precursors in minerals containing uranium or thorium. More than 25 isotopes of radon have been identi" @default.
- W2739887402 created "2017-08-08" @default.
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- W2739887402 date "2000-01-01" @default.
- W2739887402 modified "2023-09-27" @default.
- W2739887402 title "Radon in the Environment and Associated Health Problems" @default.
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