State the percentages of the gases in atmospheric air

The composition of atmospheric air is primarily made up of the following gases, measured by their mole fractions:

• Nitrogen (N₂): Approximately 78.08%
• Oxygen (O₂): Approximately 20.95%
• Argon (Ar): Approximately 0.93%
• Carbon Dioxide (CO₂): Approximately 0.04%

Additionally, air contains variable amounts of water vapor, which can range from about 0% to 3% depending on humidity levels, as well as trace amounts of other gases such as neon, helium, methane, and krypton