Answer:
Helium
Step-by-step explanation:
Nuclear reactions are broadly classified into two types: Fission and Fusion
Fission reactions are those in which a heavy unstable nucleus is split into lighter nuclei along with the release of energy. Nuclear reactors work on the principle of nuclear fission which involves the breakdown of U-235 nucleus via the following equation:
₉₂U²³⁵ + ₀n¹ → ₅₆Ba¹⁴¹ + ₃₆Kr⁹² + 3₀n¹ + 200 MeV energy
In contrast, in nuclear fusion two lighter nuclei combine to form a heavy nucleus along with the release of a large amount of energy. The principal source of energy in sun is the fusion of deuterium and tritium to form helium as shown below:
₁H² + ₁H³ → ₂He⁴ + ₀n¹ + 17.3 MeV
Thus, the product of nuclear fission is helium