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Do you know what Gas makes up most of the earth’s atmosphere?

Do you know what Gas makes up most of the earth’s atmosphere? What Gas makes up the majority of the earth’s atmosphere will be covered on this page. The layer of gases that surrounds the globe and gives it its planetary atmosphere is known as the atmosphere of Earth, also known as air.

By far the most prevalent gas in the atmosphere, nitrogen makes up around 78% of the mass of dry air.

Oxygen, which makes up between 20 and 21% of the atmosphere’s gas composition, is the second most abundant gas.

List of available gases in the atmosphere and their percentages

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%

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