NRSB RMT Practice Questions - NRSB Radon Measurement Technician Examination Exam

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Radon itself is a chemically inert noble gas. Why do its decay products (progeny) deliver most of the radiation dose to the lungs?

The progeny are electrically charged solids that attach to airborne particles, deposit in the respiratory tract, and emit alpha radiation there The progeny are gases that dissolve into the bloodstream more readily than radon The progeny emit only gamma radiation, which penetrates lung tissue more deeply The progeny have half-lives of thousands of years, so they irradiate the lungs for a lifetime

Correct Answer:

The progeny are electrically charged solids that attach to airborne particles, deposit in the respiratory tract, and emit alpha radiation there

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