Which of the following statements about chain reactions is true?
A)The key requirement for a chain reaction is that more neutrons are produced than are absorbed.
B)Three or more neutrons must be released to sustain a chain reaction.
C)Only uranium isotopes are capable of supporting a chain reaction.
D)It is not possible to stop or control a chain reaction once it has been started.
E)A chain reaction will only take place when a critical mass of material has been assembled.

Question

Quizplus · Accepted Answer

The key requirement for a chain reaction is that more neutrons are produced than are absorbed. This allows the reaction to continue and potentially accelerate.

Answer: E
 A chain reaction will only take place when a critical mass of material has been assembled. This is the minimum amount of material required for the self-sustaining reaction to occur.

Which of the Following Statements About Chain Reactions Is True