11 elements which are in gaseous state at room temperature.
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2
Hydrogen,Helium,Neon,Argon,Krypton,Xenon,Chlorine,Fluorine,Bromine Nitrogen,Oxygen
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oxygen
nitogen
chlorine
hydrogen
neon
argon
krypton
helium
xenon
radon
fluorine
nitogen
chlorine
hydrogen
neon
argon
krypton
helium
xenon
radon
fluorine
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