How does an atom change when it undergoes radioactive decay?

Question

A.
The nucleus enlarges while absorbing energy.

B.
The atom forms a chemical bond with an atom of another element.

C.
Electrons move to or from another atom.

D.
The nucleus breaks apart and releases energy.

Answer 1

D. The nucleus breaks apart and releases energy.

During radioactive decay, an unstable atomic nucleus loses energy by emitting radiation, which can include alpha particles, beta particles, or gamma rays. This process can transform the original atom into a different element or a different isotope of the same element.