Question

For which of the following events will the resulting products have more mass than the mass of the stuff from which the products came?

• A. Alpha decay
• B. Beta decay
• C. An exothermic nuclear reaction
• D. An endothermic nuclear reaction
• E. Nuclear fission of uranium $-235$

Answer 1

The correct option is D An endothermic nuclear reaction

In an endothermic nuclear reaction, heat energy is given to the reaction to proceed and thus according to Einstein's mass-energy equivalence law, heat energy given gets converted into additional mass which results in the formation of products with more mass than the reactants.