These cannot be seen with the naked eye but are visible in a beam of sunlight through a window. Matter composed of loosely packed molecules. It has neither independent shape nor volume, but expands to fill almost any container. It will not settle on the floor of a room or on the bottom of a container, even if left undisturbed. A gaseous substance formed when fast moving molecules in a liquid escape from the surface.
Evaporation describes the movement of molecules from liquid to gaseous form.
Solvents, like turpentine, form vapors as they evaporate when exposed to air. Anything that agitates or particulates a liquid creates a mist, such as spray cans, atomizers or airbrushes. Helpful Generalizations Vapors and gases are molecules. In terms of safety, there is no mask made that will trap a molecule the way dusts can be trapped. A respirator works against a molecule by absorbing it and reacting with it chemically.