1. Nitrogen (N2): This makes up about 78% of the atmosphere. It is relatively inert and does not readily participate in chemical reactions.
2. Oxygen (O2): This makes up about 21% of the atmosphere. It is essential for respiration and combustion.
3. Argon (Ar): This makes up about 0.93% of the atmosphere. It is a noble gas and does not react easily.
4. Carbon Dioxide (CO2): This makes up about 0.04% of the atmosphere. It is a greenhouse gas, and its concentration is increasing due to human activities.
Other components:
* Water vapor (H2O): The amount of water vapor in the air varies widely depending on location and weather conditions. It can range from near zero to several percent.
* Other trace gases: These include neon (Ne), helium (He), methane (CH4), krypton (Kr), hydrogen (H2), nitrous oxide (N2O), ozone (O3), and others. These gases make up a very small fraction of the atmosphere.
Note: These are approximate percentages and can vary depending on the source.
