What gases are present in the earth’s atmosphere and in what proportions?

Per order of the gas amount present in the atmosphere and in accordance with what was reported by the NASA we can find expressed in proportion, the following gases:

Molecular Nitrogen0,7808

Molecular Oxygen0,2094

Argon0,00934  

Carbon Dioxide0,00035

Neon0.00001818

Helium0.00000524

Methane0.00000170

Krypton0.00000114

Hydrogen0.00000055

Explanation:

The Earth’s atmosphere is composed of many gases. Nitrogen is the main constituent gas, which represents around of 78% or 0,78 in proportion. Per order of the gas amount present in the atmosphere and in accordance with what was reported by the NASA we can find expressed in proportion, The following gases:

Molecular Nitrogen0,7808

Molecular Oxygen0,2094

Argon0,00934  

Carbon Dioxide0,00035

Neon0.00001818

Helium0.00000524

Methane0.00000170

Krypton0.00000114

Hydrogen0.00000055

In addition of these gases, small amounts of water vapor can be present to.  

I hope it helps you

the thirteen colonies are:

connecticut, delaware, georgia, maryland, massachusetts, new jersey, new york, new hampshire, north carolina, pennsylvania, rhode island, south carolina, virginia