all things to know for noble gas
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noble gases (historically also the inert gases; sometimes referred to as aerogens[1]) make up a group of chemical elements with similar properties; under standard conditions, they are all odorless, colorless, monatomicgases with very low chemical reactivity. The six noble gases that occur naturally arehelium (He), neon (Ne), argon (Ar), krypton(Kr), xenon (Xe), and the radioactive radon(Rn). These elements are all nonmetals.Oganesson (Og) is variously predicted to be a noble gas as well or to break the trend due torelativistic effects; its chemistry has not yet been investigated.
For the first six periods of the periodic table, the noble gases are exactly the members ofgroup 18. Noble gases are typically highly unreactive except when under particular extreme conditions. The inertness of noble gases makes them very suitable in applications where reactions are not wanted. For example, argon is used in incandescent lamps to prevent the hot tungsten filament from oxidizing; also, helium is used in breathing gas by deep-sea divers to prevent oxygen, nitrogen and carbon dioxide (hypercapnia) toxicity.
For the first six periods of the periodic table, the noble gases are exactly the members ofgroup 18. Noble gases are typically highly unreactive except when under particular extreme conditions. The inertness of noble gases makes them very suitable in applications where reactions are not wanted. For example, argon is used in incandescent lamps to prevent the hot tungsten filament from oxidizing; also, helium is used in breathing gas by deep-sea divers to prevent oxygen, nitrogen and carbon dioxide (hypercapnia) toxicity.
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