Neon
Neon is named from the Greek neos, new, and was isolated in 1898. Neon is a rare gaseous element found in the atmosphere to the extent of 1 part in 65,000 of air. It is obtained by liquefaction of air and separated from the other gases by fractional distillation. Neon is used in making the common neon advertising signs which accounts for its greatest use. It is also used to make high voltage indicators, lightning arrestors, wave meter tubes and gas lasers. Liquid neon is used as a cryogenic refrigerant.