Question:

Where could nuclear energy be stored?

A: in microwave energy

B: in a beam of light

C: in the protons and neutrons of an atom

D: in X-rays or gamma rays

The correct answer is:

C: in the protons and neutrons of an atom

In fact, the nuclear energy refers to the binding energy of the nucleons (protons and neutrons) of an atom. The protons and the neutrons are held together by the strong nuclear interaction, one of the four fundamental forces of nature, and the energy associated to this interaction is called nuclear energy.