Question

in which atmosphere gasses are not found

Answer 1

By volume, dry air contains  nitrogen,  oxygen,  argon, carbon dioxide, and small amounts of other gases.

Answer 2

almost in all layer of atmosphere ,some gases present. however

in exosphere,This layer is mainly composed of extremely low densities of hydrogen, helium and several heavier molecules including nitrogen, oxygen and carbon dioxide closer to the exobase. The atoms and molecules are so far apart that they can travel hundreds of kilometers without colliding with one another. Thus, the exosphere no longer behaves like a gas, and the particles constantly escape into space.