What Kind of Gases are in the Air?

Oh my, there are so many kinds of gases in the air! There is 78% of Nitrogen, 21% Oxygen, and 3% Carbon Dioxide in the air. The other gases Radon, Helium, Xenon, Argon, and Krypton are called Noble gases, which make up 0.97% of the air. There is water vapor present, too, but the amount varies.