| Definition | Term | Hint/Explanation |
| A rule stating that no two electrons in an atom may have the same four quantum numbers (n, l, m(l), and m(s)). As a reflection of this principle, there can be no more than two elec | |
| The melting/boiling point at 1 atm pressure. | |
| The temperature at which solid, liquid, and gas phases coexist in equilibrium. | |
| Compounds whose molecules have the same overall composition but different structures. | |
| A substance (molecule or ion) that acts as a proton acceptor. | |
| A law stating that the partial pressure of a solvent over a solution, P(A), is given by the vapor pressure of the pure solvent, P˚(A), times the mole fraction of a solvent in the | |
| The time required for the concentration of a reactant substance to decrease to half its initial value; the time required for half of a sample of a particular radioisotope to decay. | |
| Those properties of a solvent (vapor-pressure lowering, freezing-point lowering, boiling-point elevation, osmotic pressure) that depend on the total concentration of solute particl | |
| The number of valence electrons in an isolated atom minus the number of electrons assigned to the atom in the Lewis structure. | |
| A measure of how closely individual measurements agree with the correct value. | |
| The highest temperature at which it is possible to convert the gaseous form of a substance to a liquid. This (term) increases with an increase in the magnitude of intermolecular fo | |
| Atoms of the same element containing different numbers of neutrons and therefore having different masses. | |
| A property of a system that is determined by the state or condition of the system and not by how it got to that state; its value is fixed when temperature, pressure, composition, a | |
| The enthalpy change, ∆H, for vaporization of a liquid. | |
| An electron-pair acceptor. | |
| The enthalpy change, ∆H, for melting a solid. | |
| An acid and a base, such as H(2)O and OHˉ, that differ only in the presence or absence of a proton. | |
| A chemical reaction in which the oxidation states of certain atoms change. | |
| Capable of behaving as either an acid or a base. | |
| A chemical reaction in which two or more substances combine to form a single product. | |
| A molecule with one end having a partial negative charge and the other end having a partial positive charge; a polar molecule. | |
| A type of magnetism that causes a substance with no unpaired electrons to be weakly repelled from a magnetic field. | |
| The particular arrangement of atoms found at the top of the potential-energy barrier as a reaction proceeds from reactants to products. | |
| The smallest increment (a quantum) of radiant energy; a photon of light with frequency v has an energy equal to hv. | |
| A measure of the separation and magnitude of the positive and negative charges in polar molecules. | |