radon progeny
Definition
Short-lived radioactive decay products of radon-222 that turn into longer-lived lead isotopes upon decaying such as bismuth 214 (radium C), lead-214 (radium B), polonium-214, and polonium-218 (radium A). These radioisotopes attach themselves to airborne particles and can damage the lung-lining on inhalation. Also called radon daughters.
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