The neon is a chemical element, of symbol and of Atomic number 10.

It is a Rare gas almost inert and without color. Neon gives a distinctive reddish gleam when it is used in the vacuum tubes and the lamps neon.

One finds it in the form of traces in the atmosphere, where its concentration is of 18  ppm.

Notable characteristics

Neon is the second the Rare gas lightest, it has 40 times the capacity of Réfrigération of the Hélium liquid and three times that of the Hydrogène liquid (with equal volume). In the majority of the applications, it is a Réfrigérant less expensive than the Hélium.

With normal tensions and running S, neon with the most intense discharge of all the rare gases.

Applications

The reddish orange color that neon emits in the tubes neon is largely used for the advertizing signals. “Neon” became the name given to this type of light although actually many other gases are used. It is about an abuse language, in particular for domestic lighting; it is actually about fluorescent tubes or luminescent tubes (of their official name).

Other uses:

• Lightning conductor S;
• in the tubes of television known as “plasma” mixes some with the Xénon;
• neon is used in certain Laser S.

Liquefied neon is used commercially like cryogenic Réfrigérant.

Notice

It is by an abusive generalization that one names neons all the fluorescent tubes and in particular those of the neon signs. Only the red is indeed possible with neon and the other colors are, is obtained with others made up (Hélium - yellow, CO {{ind|2}} - white, argon - blue), is produced by a fluorescent coating excited by a ultraviolet Rayonnement.

History

Neon comes from the Greek νέος ( neos ) who means “new”.

Sir William Ramsay and Morris Through discovered neon in Great Britain, in the liquefied air, in 1898. It belongs to group 8 of the periodic table, it is thus in the family of inert gas, composed of 10 neutrons, 10 protons as well as 8 electrons of valence. Neon is present in the atmosphere at a concentration of 0,0018  %. One can find it in a natural state in three isotopic forms: 20 (Most abundant), 21 And 22 .

See too

Simple: Neon Zh-min-nan: (Goân-sò͘)

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