Question

An unreactive gas. In the comic book world, a mineral containing the element could weaken Superman. In the real world, a radioactive form of this element is a by-product of most nuclear explosions; its presence in the atmosphere can indicate whether a nation is testing nuclear weapons. Which element does this refer to?

Options:
A) Xenon
B) Krypton
C) Argon
D) Radon

Answer 1

The element referred to in the question is Radon. Radon is an unreactive noble gas that is released from rocks and soils high in uranium content. It is not chemically reactive and is a by-product of most nuclear explosions.

Step-by-step explanation:

Radon is an unreactive noble gas that is released from rocks and soils high in uranium content. It is not chemically reactive. In the comic book world, a mineral containing radon could weaken Superman. In the real world, a radioactive form of radon is a by-product of most nuclear explosions.

Radon is a naturally-occurring radioactive gas that is invisible, odorless, and colorless. Increased exposure to radon has been correlated with an increased risk of lung cancer. Its presence in the atmosphere can indicate whether a nation is testing nuclear weapons.