A gaseous decay product of uranium that is found in rocks.

Question

BlackTom AI · Accepted Answer

The question asks: 'A gaseous decay product of uranium that is found in rocks.'

Since the answer options are not provided in the data, I will build the reasoning around the known fact:

- Radon is a noble gas produced by the radioactive decay of uranium and thorium in rocks and soil. It is one of the decay products in the uranium-238 decay series (through radium-226 to radon-222) and is well-known for seeping from rocks and accumulating in basements in some regions. This makes radon a classic example of a gaseous uranium decay product found in geological materials.

- If an option list existed, the correct choice would likely be any option naming radon, or explicitly stating that radon is a radioactive noble gas emanating from uranium-containing rocks. Any distractors would typically be other decay products that are solids or liquids, or gases not directly associated as uranium decay products.

- Potential misconceptions to avoid:
  - Confusing radon with other decay products that are solid at room temperature (e.g., lead, bismuth) or with non-uranium-related gases.
  - Assuming all decay products are gases; most uranium decay products are solids, with radon being a rare gaseous exception.

- In sum, the correct core fact is that radon is the gaseous decay product of uranium found in rocks, which aligns with established radiochemical knowledge about the uranium-238 decay chain and the geological emanation of radon gas.

AP Environmental Science-Hendricks-T2-2025 APES Unit 7 Exam MC

A gaseous decay product of uranium that is found in rocks.

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