Answer :
Final answer:
A chain reaction is a continuous fission event that produces neutrons to collide and initiate further reactions in nuclear processes.
Explanation:
A continuous fission event that produces neutrons to collide is called a chain reaction. In nuclear fission, when a uranium-235 atom absorbs a neutron and splits into two new atoms, it releases additional neutrons that can go on to cause fission in other uranium-235 atoms, perpetuating a chain reaction. The continuous production of neutrons in each reaction sustains the chain reaction process.
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