| A | B |
|---|
| Valence Electrons | Electrons in the highest occupied energy level |
| Octet Rule | Atoms will react to achieve 8 electrons in the outer energy level |
| Covalent Bonds | Electrons are shared |
| Molecular Formulas | Show the number and kinds of atoms present in a compound |
| Double Bonds | 2 pairs of electrons are shared |
| Triple Bonds | 3 pairs of electrons are shared |
| Resonance Structures | 2 or more equally valid dot structures can be written |
| Benzene | Compound with resonance |
| Dipole | two separated, but equal and opposite charges |
| Electronegativity | Measure of the attraction for electrons in a shared pair |
| Nonpolar Values | 0-0.4 Electronegativity difference |
| Polar Values | 0.5-1.7 electronegativity difference |
| Ionic Values | 1.8 + Electronegativity difference |
| London Dispersion Forces | Attraction between electrons from one molecule to the positive nuclei in another molecule |
| Hydrogen Bonding | Hydrogen of one molecule is attracted to at atom in another molecule |
| Dipole-Dipole Interactions | Polar molecules are attracted to each other |
| Cation | Positive Ion |
| Anion | Negative Ion |
| Coordination number | number of opposite ions next to each ion in a crystal lattice |
| VSEPR Theory | Valence Shell Electron Pair Repulsion - Predicts shapes of molecules |
