Why is the atmosphere classified as a mixture?
The atmosphere is a mixture mostly of component gases, but it also can contain liquids and solids. Various compounds make up the atmosphere, but each will ultimately settle or can be separated out.
In its seldom seen, clean, pure form, the atmosphere consists mainly of
More often the atmospheric mix includes
Local air may also include pollution described as haze and smog. in other places, dust or sand storms add another solid into the atmospheric mixture.
Given the right atmosphere, you are probably in the mix, as well.