What makes up air, what what are the proportions?

Question

What percent of each substances that make up water?

Answer 1

The below make up 99.998% of air

Nitrogen N2 78.084%
Oxygen O2 20.947%
Argon Ar 0.934%
Carbon Dioxide CO2 0.033%

The remaining percentage of air is made up of:

Neon Ne 18.2 parts per million
Helium He 5.2 parts per million
Krypton Kr 1.1 parts per million
Sulfur dioxide SO2 1.0 parts per million
Methane CH4 2.0 parts per million
Hydrogen H2 0.5 parts per million
Nitrous Oxide N2O 0.5 parts per million
Xenon Xe 0.09 parts per million
Ozone O3 0.07 parts per million
Nitrogen dioxide NO2 0.02 parts per million
Iodine I2 0.01 parts per million
Carbon monoxide CO trace
Ammonia NH3 trace

Answer 2

What Makes Up Air

Answer 3

79% nitrogen
20% oxygen
1% argon and other gasses.

There is actually very little hydrogen in the air.