A by-product of both fission and fusion is Energy.
Fission and fusion are nuclear reactions in which a large amount of energy is produced. Fission is actually the splitting of nuclei that is heavy and unstable into lighter nuclei in which large amount of energy is released and fusion is combination of two lighter nuclei that releases large amount of energy.
So fission and fusion both released large amount of energy.
Given a mole each for iron and magnesium, the number of atoms of each element is equal. Iron has a greater mass due to its greater molecular weight. The correct statement among the choices is D.
