Which statements describe nuclear reactions? Check all that apply.Nuclear reactions involve the nuclei of atoms.Nuclear reactions involve the electrons of atoms.The products of nuclear reactions are lighter than the reactants.The products of nuclear reactions are heavier than the reactants. Fission produces energy, while fusion requires energy.

Nuclear reactions change the nuclei of atoms, not their electrons, so A is correct and B is not. In energy-releasing nuclear reactions, some mass is converted to energy, making the products lighter than the reactants; this makes C correct and D incorrect. Both fission and fusion can release energy, so E is false.

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