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