Composition of Air

Earth's atmosphere is made up of many different gases. The reference table below lists the percent composition of each type of gas in the atmosphere.

GASVALUE
Nitrogen78.084 %
Oxygen20.9476 %
Argon0.934 %
Carbon Dioxide0.0314 %
Neon0.001818 %
Methane0.0002 %
Helium0.000524 %
Krypton0.000114 %
Hydrogen0.00005 %
Xenon0.0000087 %

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