When two or more substances (elements or compounds) come into contact without undergoing a chemical reaction, a mixture is formed. To make a combination, the ingredients do not have to be mixed in a certain ratio.
A number of gases and dust particles make up air. The majority of the space is taken up by nitrogen, oxygen, and argon, with carbon dioxide, neon, helium, sulfur dioxide, and other gases filling the rest. Water vapor is also present.
Fractional distillation of liquid air can separate air into its constituents such as nitrogen, oxygen, argon, and carbon dioxide.
Air represents the properties of all the gases that exist in the atmosphere.
Because air is made up of many different gases, it does not have a fixed formula.
Therefore, the air is a mixture of different kinds of gases.