Question 16

Radon is released when Uranium decays.

Radon is a radioactive gas that is formed as a result of the decay of uranium in the ground. This natural process is a significant source of radon in the atmosphere.

A) Kryptonite

Kryptonite is a fictional substance from comic books, particularly related to the Superman franchise, and has no basis in reality. Therefore, it cannot be involved in any natural decay processes that produce radon.

B) Lead

While lead is a heavy metal that can be produced as a decay product of radioactive elements, it is not the source of radon. Radon specifically originates from the decay of uranium, making this option incorrect.

C) Radonite

Radonite is not a recognized element or substance in scientific literature. Since it does not exist, it cannot be a source of radon gas, rendering this option invalid.

D) Uranium

Uranium is the correct answer as it is a naturally occurring radioactive element that undergoes decay, producing radon gas as one of its decay products. This process is a well-documented phenomenon in geology and environmental science.

Conclusion

The correct answer is D) Uranium, as it directly relates to the natural decay process that produces radon gas. The other options—Kryptonite, Lead, and Radonite—are either fictional, incorrect, or do not relate to the production of radon, which confirms that they are not valid answers.