Radon-222 is produced by the decay of uranium and is found in soils.

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Study for the Dual Enrollment Environmental Science Test. Prepare with flashcards and multiple choice questions, complete with hints and detailed explanations. Get ready for your exam!

Multiple Choice

Radon-222 is produced by the decay of uranium and is found in soils.

Explanation:
Radon-222 is a naturally occurring radioactive gas produced in the uranium-238 decay chain that exists in soils. Because it is a gas at room temperature, it can move through soil and enter buildings, leading to indoor exposure where uranium is present in the ground. This is why the statement—that radon-222 comes from the decay of uranium and is found in soils—is the best description. The other options describe substances that are not radioactive gases produced from uranium in soils.

Radon-222 is a naturally occurring radioactive gas produced in the uranium-238 decay chain that exists in soils. Because it is a gas at room temperature, it can move through soil and enter buildings, leading to indoor exposure where uranium is present in the ground. This is why the statement—that radon-222 comes from the decay of uranium and is found in soils—is the best description. The other options describe substances that are not radioactive gases produced from uranium in soils.

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