| Term | Definition |
| boiling point | stronger molecular forces yield higher B.P., increase with molecular mass |
| melting point | stronger the forces, the higher the M.P., affected by large pressures, increase left to right until they reach |
| surface tension | increase with mass, decreases with dissolved substances |
| London Forces | increase with molecular mass, if dominant vapor pressure |
| viscosity | increases with molar mass (depends also on tangling) |
| hydrogen bonding | increase the boiling point |
| lattice energy | increases with shared electrons (LE = product of ionic charges) decreases down a group |
| electrical conductivity | delocalized electrons (not molecular or ionic) |