What gasses are in air
Nitrogen(78.09%),Oxygen(20.95%),Argon(0.93%),Carbon Dioxide(0.039%),remaining water vapor and trace gases..see http://en.wikipedia.org/wiki/Atmosphere_of_Earth
The ones i pass
If you are referring to the air in our atmosphere, the most abundant gases are oxygen and carbon dioxide. others included are nitrogen and methane.