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noble gas
no·ble gas
(
plural
no·ble gas·es
or
no·ble gass·es
)
noun
Definition:
inert rare gas:
a chemically inert rare gas belonging to group 18 of the periodic table. Helium, neon, argon, krypton, xenon, and radon are noble gases.
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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