| The molecular attraction between water molecules is ____. |
adhesion |
| The molecular attraction between dissimilar molecules is ____. |
affinity |
| The process of a solid changing directly to a gas is ____. |
cohesion |
| Water can be purified from sea water by ____. |
distillation |
| The heat energy gained or lost in a reaction is called ____. |
enthalpy |
| The gain of electrons by a molecule, atom, or ion is ____. |
exchange |
| Redox reactions always involve the ____ of electrons. |
reduction |
| Copper has a higher electron ____ (electronegativity) than zinc. |
sublimation |
