There are choices for this question namely: <span> (1) titration (2) fission (3) electrolysis <span>(4) neutralization </span></span> This is in the case of the atomic nucleus found in atoms composed of neutrons and protons. The correct answer is fission or nuclear fission to be specific. A heavy nucleus such that of high molecular weight compounds such as uranium is split into two lighter nuclei with subsequent release of massive nuclear energy.