What makes up the atmosphere?
Around 78% nitrogen, 21% oxygen, and around 1% of water vapour, and other particles such as argon, carbon dioxide, pollution, pollen, and a small percentage of different atoms and particles.
Nitrogen takes up the most space out of everything then oxygen some other stuff and pullutants
The atmosphere is mostly made up of Nitrogen (78%) Oxygen (21%) and 1% of a bunch of other stuff, such as: Argon, Carbon Dioxide, Neon, Helium, Methane, and Water Vapor.
78% nitrogen 21% O2 (dioxide) 1% trace of helium krypton argon and h2o