Reactants are the substances that are present…, Before the reaction, After the reaction, Products are the substances that are formed…, Before the reaction, After the reaction, A subscript in a chemical formula tells you the number of atoms…, In the whole reaction, In one molecule, Coefficients in a chemical equation show the number of…, Molecules, Electrons, The Law of Conservation of Mass says matter is…, Neither created nor destroyed, Created during reactions, In a balanced chemical equation, the number of atoms on both sides is…, Equal, Unequal, If the model shows 2 molecules of H₂, the total number of hydrogen atoms is…, 4, 2, When modeling reactions, atoms…, Rearrange to form new substances, Disappear completely.
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