The radioactive decay of ________ is the single greatest source of human exposure to radiation.

Question

Quizplus · Accepted Answer

Radon is a naturally occurring radioactive gas that is a daughter product of the decay of uranium and thorium. It is found in the soil, water, and air, and can accumulate in enclosed spaces such as buildings. Radon is the leading cause of lung cancer among non-smokers and is responsible for about 21,000 deaths in the United States each year. Thus, the radioactive decay of radon is the single greatest source of human exposure to radiation.

The Radioactive Decay of ________ Is the Single Greatest Source