These statements describe three different reactions. 1 - An atom shares electrons with another atom. 2 - The nucleus of an atom is split apart. 3 - An atom gains an electron from another atom. Which reaction(s) most likely release the greatest amount of energy?

Splitting an atom’s nucleus is a nuclear reaction, which releases far more energy than chemical reactions involving shared or transferred electrons. Statements 1 and 3 describe chemical reactions, so the reaction most likely to release the greatest amount of energy is statement 2, “the nucleus of an atom is split apart.”

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