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NO, not all the gases are lighter than air.
Neon, Hydrogen fluoride, Water (steam), Carbon monoxide, Ammonia, Nitrogen, Hydrogen cyanide, Methane, Ethylene, Acetylene, Methllithium, Diborane,Helium,Hydrogen are Lighter than air.
While; Arsine AsH3, Nitrogen dioxide NO2, Carbon dioxide CO2, Chlorine Cl, Fluorine F are Heavier.
Posted on Jul 29, 2010
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Posted on Jan 02, 2017
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