Definition: Given a scientific passage and an answer, generate a question for the given answer.
Input: Passage: Nuclear changes occur with a simultaneous release of energy. Where does this energy come from? If we could precisely measure the masses of the reactants and the products of a nuclear reaction, we would notice that the amount of mass drops slightly in the conversion from reactants to products. Consider the following nuclear reaction, in which the molar mass of each species is indicated to four decimal places:. Answer: energy
Output:
Nuclear changes occur with a simultaneous release of what, and a slight drop in mass?