The fission of a heavy nucleus gives, in general, two smaller nuclei, two or three neutrons, some $\mathrm{\beta }$-particles and some $\mathrm{\gamma }$-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 law for stability.