Here's a breakdown of the major components of the atmosphere:

* Nitrogen (N2): 78.08%

* Oxygen (O2): 20.95%

* Argon (Ar): 0.93%

* Carbon Dioxide (CO2): 0.04%

* Other Gases: Trace amounts (including neon, helium, methane, krypton, hydrogen, etc.)

While argon is the third most abundant gas in the atmosphere, it makes up a much smaller percentage compared to nitrogen and oxygen.