| A | B |
|---|
| coefficient | a small whole number that appears in front of a formula in a balanced chemical equation |
| spectator ion | a particle not directly involved in a chemical reaction |
| combustion reaction | a reaction in which oxygen reacts with another substance, often producing heat or light |
| reactant | a starting substance in a chemical reaction |
| balanced equation | a chemical equation in which mass is conserved; each side of the equation has the same number of atoms of each element |
| activity series | a list of metals in order of decreasing reactivity |
| product | a new substance formed in a chemical reaction |
| decomposition reaction | a reaction in which a single compound is broken down into simpler substances |
| single-replacement reaction | a reaction in which the atoms of one element replace the atoms of a second element |
| chemical equation | an expression representing a chemical reaction; the formulas of the reactants (on the left) are connected by an arrow with the formulas for the products (on the right) |
| skeleton equation | a chemical equation that does not indicate the relative amounts of reactants and products |
| catalyst | a substance that increases the rate of reaction by lowering the activation-energy barrier; the catalyst is not used up in the reaction |
| combination reaction | a chemical change in which two or more substances react to form a single new substance; also called a synthesis reaction |
| double-replacement reaction | a chemical change that involves an exchange of positive ions between two compounds |
| complete ionic equation | an equation that shows dissolved ionic compounds as dissociated free ions |
| net ionic equation | an equation for a reaction in solution showing only those particles that are directly involved in the chemical change |
