| A | B |
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| Catalyst | A material that speeds up a reaction but is not consumed in the reaction. |
| Chemical Energy | Stored energy in chemical bonds. |
| Chemical Equation | A representation of a chemical reaction in which reactants and products are expressed in formulas. |
| Coefficients | Whole numbers that are placed in front of reactants or products to help balance the equation. |
| Combustion Reaction | When a reactant reacts with oxygen rapidly, usually producing heat or light. |
| Decomposition Reaction | A reaction where one reactant is broken down into two or more products. |
| Double Replacement Reaction | A reaction where two elements change places making two new products. |
| Endothermic Reaction | Energy is absorbed from the surrounding environment in the reaction. |
| Equilibrium | A state when a chemical reaction is in balance. |
| Exothermic Reaction | Energy is released to the surrounding environment from the reaction. |
| Molar Mass | The mass of one mole of a substance. |
| Mole | A measurement used in chemical reactions. |
| Oxidation-Reduction Reaction | A reaction where electrons are transferred from one reactant to another. |
| Products | The new substances created in chemical reactions. |
| Reactants | The substance that undergoes change in chemical reactions. |
| Reaction Rate | The rate at which reactants change into products overtime. |
| Reversible Reactions | A reaction that the reactants going to products and the products can go back to reactants simultaneously. |
| Single Replacement Reactions | A reaction in which one element takes the place of another element in a compound. |
| Synthesis Reaction | A reaction where two or more substances are combined to make a single product. |
