A) A heavy nuclei breaks by itself
B) A heavy nuclei bombarded by thermal neutrons break up
C) A light nucleus bombarded by thermal neutrons break up
D) The light nucleus combine to produce a heavier nucleus
Correct Answer: A
Solution :
Nuclear fission is a process in which a heavy nucleus is broken into two nearly equal fragments. The mass of the nuclei obtained by fission is less than the mass of the integrated nucleus and the lost mass reappears in the form of energy according to Einsteins mass energy relation.
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