| A | B |
|---|
| Chemical Reaction | A change in matter that produces one or more new substances |
| Chemical Equation | A way to show a chemical reaction, using symbols |
| Physical Property | A characteristic that can be observed without changing it into another substance |
| Chemical Property | A characteristic that can describe its ability to change into a new substance(s) |
| Precipitate | A solid that forms from a solution and "falls" out of the solution |
| Exothermic Reaction | A reaction that releases energy in the form of heat |
| Endothermic Reaction | A reaction that absorbs energy making it feel cooler |
| Reactant | The substance(s) you start with before a chemical reaction (ex. Sodium, Na and Chlorine, Cl) |
| Product | The substance(s) you end up with after a chemical reaction (ex. NaCl) |
| Conservation of Mass | Principle that states, "During a chemical reaction, the total mass of the reactants must equal the total mass of the products" |
| Open System | A system where matter can enter and exit from the surroundings |
| Closed System | A system where matter can't enter and exit from the surrounding |
| Coefficient | The number placed in front of a chemical formula |
| Chemical Formula | A combination of symbols that represent a substance (ex. H2O) |
| Synthesis | A chemical reaction where two or more substances (reactants) combine to form a more complex substance (product) |
| Decomposition | A chemical reaction that breaks down substances (reactant) into simpler products |
| Replacement | A chemical reaction where one element replaces another in a compound |
| Concentration | The amount of one material in a specific volume of another material |
