What are the most common gases in the earths atmosphere?

Question

What are the most common gases in the earths atmosphere?

Answer 1

This is the composition of Earth's Atmosphere.

Gas Name Chemical Formula     Percent Volume

Nitrogen                          N2                        78.08%

Oxygen                          O2                        20.95%

*Water                       H2O                         0 to 4%

Argon                          Ar                            0.93%

*Carbon Dioxide       CO2                            0.0360%

Neon                          Ne                            0.0018%

Helium                          He                            0.0005%

*Methane       CH4                            0.00017%

Hydrogen         H2                            0.00005%

*Nitrous Oxide        N2O                            0.00003%

*Ozone                         O3                            0.000004%

Answer 2

oxygen(.O2) , nitrogen(N2), carbondioxide(CO2).

Answer 3

carbon dioxide and oxygen....

but the common we used are oxygen.

Answer 4

Nitrogen and oxygen, but there is much more of the first.

Answer 5

The Earth's atmosphere consists of a gaseous mixture, most of which is nitrogen (78%), oxygen (21%), and the remaining percent includes noble gases, hydrocarbons, and nitrogen compounds.