What is Q value of a nuclear reaction?

In a nuclear reactor

In nuclear reactor

What is criticality of a nuclear reaction? How is it achieved?

What is a nuclear reactor ?

What are the types of nuclear reaction. Give example for each type.

What is the nature of nuclears force?

Draw the schematic diagram of a nuclear reactor and label its parts. What is the function of a moderator in a nuclear reactor?

What is the range of nuclear forces ?