|
Composition
of Air |
| Component of Air |
Symbol |
Content - %
Volume |
| Nitrogen |
N2 |
78.084 % |
| Oxygen |
O2 |
20.947 % |
| Argon |
Ar |
0.935 % |
| Carbon Dioxide |
CO2 |
0.033 % |
| Neon |
Ne |
18.2 parts/million |
| Helium |
He |
5.2 parts/million |
| Krypton |
Kr |
1.1 parts/million |
| Sulphur Dioxide |
SO2 |
1.0 parts/million |
| Methane |
CH4 |
2.0 parts/million |
| Hydrogen |
H2 |
0.5 parts/million |
| Nitrous Oxide |
N2O |
0.5 parts/million |
| Xenon |
Xe |
0.09 parts/million |
| Ozone |
O3 |
0.0 to 0.07 parts/million |
| Ozone - Winter |
O3 |
0.0 to 0.02 parts/million |
| Nitrogen Dioxide |
NO2 |
0.02 parts/million |
| Iodine |
I2 |
0.01 parts/million |
| Carbon Monoxide |
CO |
0.0 to trace |
| Ammonia |
NH3 |
0.0 to trace |
| The above table is an
average for clean, dry air at sea level |
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