Neon () is the chemical element that has the symbol Ne and atomic number 10. A very common element in the universe, it is rare on Earth. A colorless, inert noble gas under standard conditions, neon gives a distinct reddish glow when used in vacuum discharge tubes and neon lamps. It is commercially extracted from air, in which it is found in trace amounts. History Neon (Greek ????(neon) meaning "new one") was discovered in 1898 by Scottish chemist William Ramsay (1852 - 1916) and English chemist Morris W. Travers in London, England. Neon was discovered when Ramsay chilled a sample of the atmosphere until it became a liquid, then warmed the liquid and captured the gases as they boiled off. The three gases were krypton, xenon, and neon. Isotopes Neon has three stable isotopes: ^20Ne (90.48%), ^21Ne (0.27%) and ^22Ne (9.25%).

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z # TAGS