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A gas that is not chemically reactive, especially a noble gas.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
1. (Elements & Compounds) Also called: noble gas, rare gas or argonon any of the unreactive gaseous elements helium, neon, argon, krypton, xenon, and radon
2. (Chemistry) Also called: noble gas, rare gas or argonon any of the unreactive gaseous elements helium, neon, argon, krypton, xenon, and radon
3. (Chemistry) (loosely) any gas, such as carbon dioxide, that is nonoxidizing
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
any of the chemically inert gaseous elements of group 8A or 0 of the periodic table: helium, neon, argon, krypton, xenon, and radon. Also called inert gas.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
See noble gas.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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|Noun||1.||inert gas - any of the chemically inert gaseous elements of the helium group in the periodic table|
chemical element, element - any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter
Ar, argon, atomic number 18 - a colorless and odorless inert gas; one of the six inert gases; comprises approximately 1% of the earth's atmosphere
atomic number 2, He, helium - a very light colorless element that is one of the six inert gasses; the most difficult gas to liquefy; occurs in economically extractable amounts in certain natural gases (as those found in Texas and Kansas)
atomic number 36, Kr, krypton - a colorless element that is one of the six inert gasses; occurs in trace amounts in air
atomic number 10, Ne, neon - a colorless odorless gaseous element that give a red glow in a vacuum tube; one of the six inert gasses; occurs in the air in small amounts
atomic number 86, radon, Rn - a radioactive gaseous element formed by the disintegration of radium; the heaviest of the inert gasses; occurs naturally (especially in areas over granite) and is considered a hazard to health
atomic number 54, Xe, xenon - a colorless odorless inert gaseous element occurring in the earth's atmosphere in trace amounts
gas - a fluid in the gaseous state having neither independent shape nor volume and being able to expand indefinitely
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
n (Chem) → Edelgas nt
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