Which statement describes what happens to elements during radioactive decay?

A-They release energy.

B-They gain new particles.

C-They lose energy at a varying rate.

D-They have a consistent number of particles.

Option (A)

Explanation:

Radioactive decay is usually defined as a process by which an unstable nucleus of an atom continuously disintegrates into a stable nucleus, resulting in the liberation of a large amount of energy as well as matter.

The radioactive substances undergoes radioactive decay and these released energy is very harmful as they are emitted in the form of ionizing radiation.

These process of radioactive decay is commonly known as radioactivity.

Thus, the correct answer is option (A).

The correct answer is option A-"They release energy".

Explanation:

The phenomenon of radioactive decay, also known as radioactivity or nuclear radiation, occurs when an unstable atomic nucleus emits radiation and loses energy and mass in the process. The elements during radioactive decay release energy and mass trying to reach a stable form. The material that has the unstable nucleus is considered radioactive.