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Radon and helium are both by-products of the radioactive decay of uranium minerals. A fresh sample...
Radon is a naturally occurring radioactive gas that comes from the radioactive decay (transmutation) of uranium and it is found in certain soils. Because it is heavier than air, it tends to build up in the lower levels of households, like basements. Radon and its decay products can pose serious health hazards to people that are exposed to them. When radon-222 undergoes alpha decay, it transmutates into what daughter nucleus?