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Air Composition at Sea-Level
(in percent by volume at the temperature of 15°C and the pressure of 101325 Pa)
| Name | Symbol | Percent by Volume |
|---|---|---|
| Nitrogen | N2 | 78.084 % |
| Oxygen | O2 | 20.9476 % |
| Argon | Ar | 0.934 % |
| Carbon Dioxide | CO2 | 0.0314 % |
| Neon | Ne | 0.001818 % |
| Methane | CH4 | 0.0002 % |
| Helium | He | 0.000524 % |
| Krypton | Kr | 0.000114 % |
| Hydrogen | H2 | 0.00005 % |
| Xenon | Xe | 0.0000087 % |
