Composition of "Dry" Air
|
Gas |
Symbol |
Volume % |
|
Nitrogen |
N2 |
78.084 |
|
Oxygen |
O2 |
20.946 |
|
Argon |
Ar |
0.9340 |
|
Carbon Dioxide |
CO2 |
0.03697 |
|
Neon |
Ne |
0.00182 |
|
Helium |
He |
0.00052 |
|
Methane |
CH4 |
0.00014 |
|
Krypton |
Kr |
0.00010 |
|
Ozone |
O3 |
variable |
|
Nitrous oxide |
N2O |
trace |
|
Hydrogen |
H2 |
trace |
|
Xenon |
Xe |
trace |
from Christopherson (2003)
Water vapor, H20, may range from near zero
to about 2%.