Question

which fact is true during a fission chain reaction? (1 point) the total number of protons will increase over time. the total number of protons will decrease over time. the number of freely - moving neutrons decreases over time. the number of freely - moving neutrons increases over time.

Explanation:

In a fission chain - reaction, a neutron strikes a nucleus, causing it to fission and release more neutrons. These neutrons can then strike other nuclei, continuing the chain - reaction. So the number of freely - moving neutrons increases over time. Protons are bound within the nuclei and do not play the same key role in the chain - reaction process as neutrons do.

Answer:

The number of freely - moving neutrons increases over time.