If the particles formed through fission have less mass than the starting material, has the Law of Conservation of Energy been broken? A. Yes, nuclear reactions break atoms apart so they do not need to follow the Law of Conservation of Mass. B. No, the particles are at a higher state of energy causing them to seem like they weigh less. C. No, some of the mass has been transformed into energy. D. Yes, scientists are still unsure how this is possible.