inert gas

Pronunciation:			in'urt gas
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	Definition:		[n]  any of the chemically inert gaseous elements of the helium group in the periodic table
	Synonyms:		argonon, noble gas
	See Also:		Ar, argon, atomic number 10, atomic number 18, atomic number 2, atomic number 36, atomic number 54, atomic number 86, chemical element, element, gas, He, helium, Kr, krypton, Ne, neon, radon, Rn, Xe, xenon