Subject: Chemistry
Book: General Chemistry
Noble gases (Group 18) include helium, neon, argon, krypton, xenon, and radon. They have complete valence electron shells, making them mostly nonreactive under standard conditions. However, some compounds of xenon, krypton, and radon have been synthesized under extreme conditions. Noble gases find use in lighting (neon signs), shielding gas in welding (argon), and cryogenics (liquid helium). Their stability and inertness make them valuable in various scientific and industrial applications.
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