Answer :

trisha
oxygen-21%
nitrogen-78%
carbon dioxide-0.09%
water vapour-varies
other gases and dust particles-0.03%
sowmyasreemajj
The air in our atmosphere is composed of molecules of different gases.The most common gases are Nitrogen(78%),Oxygen(about 21%) and argon(about 1%).Other molecules are present in the atmosphere as well,but in very small quantities.

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