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i don't know the percentages but i do know that hydrogen and helium are the 2 main gases! sorry this did not completely answer the question:(
That's because water vapor is so variable in its concentration in the atmosphere.
Go to images.google.com and search for gases in the atmosphere.
Nitrogen (about 78%) and oxygen (about 21%).
Gases in air are nitrogen about 79%, oxygen about 20% and other gases 1%
line graph
Cirle Graph.
Nitrogen - 78% Oxygen - 21% Carbon Dioxide - 0.04% Noble gases - 0.96%
depends which types of gases you are referring to
The inner core of Earth contains Iron and Nickel. I do not know the percentages of each gas.
It is simpler because the amount of water vapor in the air can change.
Nearly 100% of air is gas. The rest is particulate matter: dust, pollen, and also tiny organisms.