Question

how is nitrogen percentage is most in air as oxygen was produced by plants first​

Answer 1

Answer:

Standard dry air, which is mainly composed of three gases: nitrogen (about 78%), oxygen (about 21%), and argon (about 1%).  Together, these three gases make up 99.96% of dry air.  All three can be economically recovered as industrial gas products.  Standard dry air also contains a small amount of carbon dioxide, and very small amounts of neon, helium, krypton, hydrogen and xenon

Answer 2

Explanation:

Due the reactions taking place when the earth was formed high amount of nitrogen was released.