| A | B |
|---|
| chemical properties | are how a substance reacts and changes with other substances under which conditions. |
| chemical changes | one or more substances combine or break apart to form new substances. |
| chemical equations | show the reactants and products of a reaction on either side of an arrow showing the direction of the reaction. |
| Reactants | are the chemicals before the reaction (right side 2 H2 + O2) |
| Products | are the chemicals after the reaction. (left side 2 H20 ) |
| conservation of mass | matter is neither created nor destroyed during a chemical reaction |
| balanced equation | the same number of atoms on both sides of the equation. |
| Exothermic | reactions give off heat making substances warmer. |
| Endothermic | reactions absorb heat making substances cooler. |
| bonds | store energy that is related to thermal energy. |
| concentration | how much chemical is present |
| surface area | how much is exposed to the reaction (powder versus block) |
| temperature | thermal energy often speeds reactions |
| catalysts/enzymes | molecules that help the reaction |
| inhibitors | molecules that slow reactions |
| yields | the arrow in a chemical equation |
