Definitions for noble gas
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Random House Webster's College Dictionary
no′ble gas′(n.)
any of the chemically inert gaseous elements of group 8A or 0 of the periodic table: helium, neon, argon, krypton, xenon, and radon.
Category: Chemistry
Ref: Also called inert gas.
Origin of noble gas:
1900–05
Princeton's WordNet
noble gas, inert gas, argonon(noun)
any of the chemically inert gaseous elements of the helium group in the periodic table
Wiktionary
noble gas(Noun)
Any of the elements of group 18 of the periodic table, being monatomic and (with very limited exceptions) inert.
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