definitions 7.3

Nuclear Fission
The splitting of a more massive nucleus into two less massive nuclei, subatomic particles, and energy.
Nuclear Reaction
Process in which an atom’s nucleus changes by gaining or releasing particles or energy.
Chain Reaction
The ongoing process in which one reaction initiates the next reaction.
CANDU reactor
Canadian Deuterium Uranium reactor
The process in which two low mass nuclei join together to make a more massive nucleus.