Question

During nuclear fusion reaction :

• A. a heavy nucleus breaks into two fragments by itself
• B. a light nucleus bombarded by thermal neutrons breaks up
• C. a heavy nucleus bombarded by thermal neutrons breaks up
• D. two light nuclei combine to give a heavier nucleus and possibly other products

Answer 1

Answer: (D)

When two lighter nuclei moving at very high speeds fuse together to form a single heavier nucleus, then the phenomenon is called nuclear fusion.
The mass of the nucleus brained after fusion is less than the masses of the nuclei which are fused together. The lost mass is obtained in the form of energy.