Symbol: Ne

Atomic number: 10

Average atomic mass: 20.1797

Neon was discovered in 1898 by Scottish chemist William Ramsey. Ramsay chilled a sample of the atmosphere until it became a liquid, then warmed the liquid and captured the gases as they boiled off, proving that the element is obtained by liquefaction of air.

Neon is used for neon signs, high-voltage indicators, lightning arrestors, wave meter tubes and TV tubes. Mixtures of neon and helium are used for gas lazers. Liquid neon is commercially available as a cryogenic refrigerant.

Neon is the fifth most abundant chemical element in the universe by mass and is the second lightest noble gas. Its normal color is reddish-orange. All other "neon" colors are created using a mercury vapor discharge which excites a phosphor via fluorescence, or by the other Noble Gases.

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