| A | B |
|---|
| Ionic Bond | A chemical bond between two ions with opposite charge |
| Covalent Bond | Chemical bond that involves the sharing of pairs of electrons between atoms. |
| Reactants | The starting materials for a reaction |
| Products | The ending materials for a reaction |
| Metal | A solid material that is hard |
| Non Metal | Elements that lack the physical and chemical properties of metals |
| Endothermic Reaction | a chemical reaction accompanied by the absorption of heat |
| Exothermic Reaction | a chemical reaction accompanied by the release of heat |
| Energy Levels | The possible locations around an atom where electrons having specific energy values may be found. |
| Ions | An atom or molecule with a net electric charge due to the loss or gain of one or more electrons. |
| Law of Conservation of Matter | matter cannot be created or destroyed in an isolated system |
| Law of Conservation of Energy | Energy is neither created nor destroyed in an isolated system. |
| Coefficient | A numerical or constant quantity placed before and multiplying the molecules in an equation |
| Subscript | indicate the ratio of elements in an equation |
| Activation Energy | The minimum energy required to start a chemical reaction. |
| Synthesis | Two or more reactants join together to make products that are fewer in number but larger in atom count. |
| Decomposition | A reactant breaks apart to form products that are greater in number but smaller in atom count |
| Single Replacement | An element reacts with a compound to form a new element and a different compound |
| Double Replacement | Two compounds react to form two new compound |
