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colorless and odorless inert gas; one of the six inert gases; comprises approximately 1% of the earth's atmosphere Ar , argon , atomic number 18
chemical group O that is inert argon , helium , inert gas , krypton , neon , noble gas , radon , xenon
inert gas argon , neon , radon , xenon
any of the chemically inert gaseous elements of the helium group in the periodic table argonon , inert gas , noble gas
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 10 , Ne , neon
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 2 , He , helium
colorless element that is one of the six inert gasses; occurs in trace amounts in air atomic number 36 , Kr , krypton
colorless odorless inert gaseous element occurring in the earth's atmosphere in trace amounts atomic number 54 , Xe , xenon
common nonmetallic element that is normally a colorless odorless tasteless inert diatomic gas; constitutes 78 percent of the atmosphere by volume; a constituent of all living tissues atomic number 7 , N , nitrogen
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 86 , radon , Rn
hydroponic method of growing plants by allowing nutrient solutions to drip slowly onto an inert medium in which the plants are growing drip culture
series of inert gases helium group
disposition to remain inactive or inert inactiveness , inactivity , inertia
immobility by virtue of being inert inertness
innocuous or inert medication; given as a pacifier or to the control group in experiments on the efficacy of a drug placebo
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