The gases mainly found in the exosphere layer are

Concept:​
Atmosphere
-The atmosphere is a blanket of life-giving gases like oxygen for animals and CO2 for plants and many other gases, over the surface of the earth.
-Our atmosphere is divided into five layers starting from the earth’s surface.
-These are Troposphere, Stratosphere, Mesosphere, Thermosphere and Exosphere.
Exosphere
-The uppermost layer of the atmosphere is known as the exosphere.
-This layer has very thin air.
-Light gases float into the space from here.
-This layer act as a transitional layer between space and the earth's atmosphere.

✅ Explanation:
-The exosphere layer is mostly made up of hydrogen and helium with extremely low concentrations.
-Atoms and molecules are separated by such a large distance that they can traverse hundreds of kilometres without colliding.
-In this layer, gases such as monatomic helium and diatomic hydrogen float into space.

🔴Additional Information:
Nitrogen
-Nitrogen gas is mainly found in the Troposphere.
-In the atmosphere, nitrogen is quite stable and does not participate in many chemical reactions.
-It is heavier than hydrogen and helium so it's found in the lower layer of the atmosphere.
Oxygen
-Oxygen is also found in the troposphere.
-The troposphere is 16km at the equator and 8 km at the poles, in which we live