BROMINE, CHARLES, CHEMICAL, CHEMICALS, CHEMISTRY, CONCENTRATION, DEMONSTRATION, DIFFUSION, EDUCATIONAL, ELEMENT, ELEMENTS, EQUILIBRIUM, EVAPORATION, EXPERIMENT, FLASK, GAS, GASES, GLASSWARE, IN, JAR, JARS, LIQUID, NON-METAL, NON-METALS, NONMETAL, NONMETALS, ORANGE, PURE, SCIENCE, SCIENTIFIC, VACUUM, VAPOR, VAPORS, WINTERS,