Which best describes a chain reaction associated with a nuclear reaction?

Question

Neutrons released during a fusion reaction cause other nuclei to fuse.
Neutrons released during a fission reaction cause other nuclei to split.
Helium nuclei released during a fission reaction cause other nuclei to split.
Helium nuclei released during a fusion reaction cause other nuclei to fuse.

Answer 1

The statement that best describes a chain reaction associated with a nuclear reaction is:

Neutrons released during a fission reaction cause other nuclei to split.

In a fission reaction, when a heavy nucleus splits into smaller nuclei, it typically releases additional neutrons. These released neutrons can then go on to induce fission in other nearby nuclei, leading to a self-sustaining chain reaction.