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| activity series | a list of elements organized according to the ease with which the elements undergo certain chemical reactions |
| chemical equation | a representation, with symbols and formulas, of the identities and relative amounts of the reactants and products in a chemical reaction |
| coefficient | a small whole number that appears in front of a formula in a chemical equation |
| combustion reaction | a reaction in which a substance combines with oxygen, releasing a large amount of energy in the form of light and heat |
| composition reaction | a reaction in which two or more substances combine to form a new compound |
| decomposition reaction | a reaction in which a single compound produces two or more simpler substances |
| displacement reaction | a reaction in which one element replaces a similar element in a compound |
| double-replacement reaction | a reaction in which the ions of two compounds exchange places in an aqueous solution to form two new compounds |
| electrolysis | the decomposition of a substance by an electric current |
| formula equation | a representation of the reactants and products of a chemical reaction by their symbols or formulas |
| Precipitate | a solid that is produced as a result of a chemical reaction in solution and that separates from the solution |
| reversible reaction | a chemical reaction in which the products re-form the original reactants |
| single-replacement reaction | a reaction in which one element replaces a similar element in a compound |
| synthesis reaction | a reaction in which two or more substances combine to form a new compound |
| word equation | an equation in which the reactants and products in a chemical reaction are represented by words |
