Group 18 Elements

Group 18: The Noble Gases

Group 18 of the periodic table brings together helium, neon, argon, krypton, xenon, radon and oganesson. Every member of this group exists as a gas under ordinary conditions, and all of them are strikingly unreactive chemically. This near-total lack of chemical activity, and the resulting scarcity of compounds they form, is exactly why chemists call them the noble gases — much as a "noble" metal res …