Question

Which fact is true during a fission chain reaction?(1 point)
Responses

The total number of protons will decrease over time.
The total number of protons will decrease over time.

The number of freely-moving neutrons increases over time.
The number of freely-moving neutrons increases over time.

The total number of protons will increase over time.
The total number of protons will increase over time.

The number of freely-moving neutrons decreases over time.

Answer 1

The true fact during a fission chain reaction is:

**The number of freely-moving neutrons increases over time.**

In a fission chain reaction, when a nucleus splits, it releases neutrons. If these neutrons are absorbed by other fissile nuclei, they can cause further fission events, thus increasing the number of freely-moving neutrons in the process until the reaction is controlled or results in a rapid increase (like in a nuclear explosion).