20. The product of a nuclear reaction usually have a different mass than the reactants. Why?
Interpretation: To explain why the products of a nuclear reaction have different mass than the reactants.
Concept introduction: A nuclear reaction is the one in which two nuclei or a nucleus of an atom and a subatomic particle collide to form one or more nuclides giving a large amount of energy. In this type of reaction, the product nuclides are different from the nuclides that start the reaction. The lost mass is transformed into energy.
To explain: Why the products of a nuclear reaction usually have different mass than the reactants
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