Which gasses are found in the atmosphere? which is found in the greatest amount?

Nitrogen (78%), Oxygen (21%), Argon (0.9%), and the remaining 0.1% consists of traces of neon, krypton xenon, carbon dioxide, nitrogen oxides, and traces of others. so Nitrogen is the greatest. I hope this helps :)

Answerair masses develop near the equator are warm; tropical air mass