* Nitrogen (N2): The most abundant element, making up about 78% of the atmosphere.

* Oxygen (O2): Essential for respiration and combustion, making up about 21% of the atmosphere.

* Argon (Ar): An inert gas, comprising roughly 0.93% of the air.

Other Trace Gases:

* Carbon dioxide (CO2): A greenhouse gas, present at about 0.04%.

* Neon (Ne), Helium (He), Krypton (Kr), Xenon (Xe): Inert gases found in trace amounts.

* Ozone (O3): Found in the stratosphere, where it absorbs harmful ultraviolet radiation.

* Water vapor (H2O): Varies significantly depending on location and weather conditions.

* Other gases: Trace amounts of methane (CH4), hydrogen (H2), nitrous oxide (N2O), and other gases.

It's important to note that the exact composition of air can fluctuate depending on factors like altitude, location, and pollution levels.