Question

The fission of a heavy nucleus gives, in general, two smaller nuclei, two or three neutrons, some $\beta -particles$, and some $\gamma -radiation$. It is always true that the nuclei produced

• A. have a total rest-mass that is greater than that of the original nucleus
• B. have large kinetic energies that carry off the greater part of the energy released
• C. travel in exactly opposite directions
• D. have neutron-to-proton ratios that are too low for stability
• E. have identical neutron-to-proton ratios

Answer 1

Answer: (B)

have large kinetic energies that carry off the greater part of the energy released

The nucleus is deeply divided in two large fission fragments or nuclei of roughly same mass. The nuclei or fission fragment fly apart at a great speed thus possess large kinetic energies that carries off the greater part of energy released.