Final answer:
When a slow neutron hits a fissionable U-235 nucleus, it forms an unstable U-236 nucleus that breaks apart into two smaller nuclei and releases a large amount of energy. The U-236 nucleus then rapidly breaks apart into two smaller nuclei (in this case, Ba-141 and Kr-92) along with several neutrons (usually two or three), and releases a very large amount of energy.
Step-by-step explanation:
The question is related to nuclear fission, which falls under the subject of Chemistry. When a slow neutron hits a fissionable U-235 nucleus, it is absorbed and forms an unstable U-236 nucleus. The U-236 nucleus then rapidly breaks apart into two smaller nuclei (in this case, Ba-141 and Kr-92) along with several neutrons (usually two or three), and releases a very large amount of energy.