| A | B |
|---|
| Coefficient | A number placed in front of a chemical formula. |
| Reactant | A substance that enters into and is changed in the course of a chemical reaction. |
| Product | Substances produced in a chemical reaction. |
| Chemical reaction | The breaking of bonds to form new substances. |
| Balance | Number and type of atoms in a chemical equation are equal. |
| Conservation of Atoms | The number of atoms on the reactant side must equal the number of atoms on the product side. |
| Chemical Equation | Chemical formulas and symbols that represent a chemical reaction. |
| Excess Reactant | Reactant that is not completely used up. |
| Limiting Reactant | Reactant used up first in a chemical reaction. |
| Combustion Reaction | Reaction in which a substance combines with oxygen and releases large amounts of energy in the form of light and heat. |
| Precipitate | A substance formed that does not dissolve in water. |
| Addition Reaction | Chemical reaction in which 2 or more substances combine to form a new compound. |
| Percent Yield | The actual yield of product in a chemical reaction. |
| Physical Change | Changes in the physical properties of a substance. |
| Dissolution Reaction | Reaction that occurs when ionic compound dissolves in water to make an ionic solution. |
| Endothermic Reaction | Reaction in which more energy is required to break the bonds than is released. |
| Exothermic Reaction | Occurs when less energy is required to break bonds than is released. |
| Double- displacement Reaction | Ions from2 compounds in solution exchange places to produce 2 new compounds. |
| Single-displacement Reaction | One element replaces a similar element in a compound. |
