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Air Composition at Sea Level
Name
Symbol
Percent by Volume
Nitrogen
N
2
78.084 %
Oxygen
O
2
20.9476 %
Argon
Ar
0.934 %
Carbon Dioxide
CO
2
0.0314 %
Neon
Ne
0.001818 %
Methane
CH
4
0.0002 %
Helium
He
0.000524 %
Krypton
Kr
0.000114 %
Hydrogen
H
2
0.00005 %
Xenon
Xe
0.0000087 %
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