The change from a solid to a gas without passing through the liquid state.

A superheated gas composed of electrically charged particles.

An atom that has gained or lost one or more electrons.

The lowest possible temperature at which matter has no remaining thermal or heat energy.

A temperature scale that begins at absolute zero.

The ability to store and release heat energy.

The quality of having opposite charges for different points of a molecule.

A weak bond that connects hydrogen-containing molecules at polar areas.

The elastic property of liquids that allows drops to form and creates the smallest area possible at the surface of a liquid.

The ability of one substance to dissolve in another.

The resistance of a liquid to flow.

A range of values from 0 to 14 that indicates the concentration of hydrogen ions in a solution.

A substance with a pH less than 7.

A substance with a pH greater than 7.