Question

In a nuclear chain reaction, _______ are used to trigger fission reactions.

A. electrons
B. protons
C. alpha particles
D. neutrons

Answer 1

The correct answer is D ,Neutrons

Answer 2

Answer: Option (D) is the correct answer.

Step-by-step explanation:

Nuclear chain reactions occur in fission reactions only. Nuclear fission reactions are defined as the reactions in which larger nuclide splits into two or more smaller daughter nuclides.

For example,
`^(235)_(92)U + ^(1)_(0)n \rightarrow ^(90)_(36)Kr + ^(144)_(56)Ba + 3^(1)_(0)n`

These neutrons released will again bombard with the uranium atom leading to another fission reaction and this chain continues.

Thus, we can conclude that in a nuclear chain reaction, neutrons are used to trigger fission reactions.