The answer is: [D]: a reactant.
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I think the correct answer from the choices listed above is option C. New nuclei and neutrons result from <span>the splitting of an atom's nucleus. It is called nuclear fission where atoms are being split into smaller parts. Hope this answers the question. Have a nice day.</span>
Density is the mass of a substance per unit volume. Volume is the amount of space an object occupies.
