| A | B |
| Ionic Bond | The bond that results when one or more electrons is transferred from one atom to another. |
| Covalent Bond | The bond that occurs due to the sharing of electrons between two or more atoms. |
| Polar Covalent Bond | The bond that occurs when electrons are not shared equally between two or more atoms. |
| Hydrogen Bond | The weak bond that forms between two polar molecules. |
| Atomic # | Refers to the number of protons in an atom. |
| Atomic mass | The number of protons + the number of neutrons. |
| The number of protons | Determines the physical properties of an atom. |
| The number of electrons | Determines the chemical properties of an atom. |
| Isotopes | Atoms with the same atomic number but different atomic masses. |
| Isomers | Molecules with the same atomic components but different structures. |