The methane, CO2, and nitrogen was probably boiled out of the rocks that formed the planet.
The two most abundant gases in Earth's atmosphere are nitrogen (about 78%) and oxygen (about 21%).
The three most abundant gases in Earth's atmosphere are nitrogen (78%), oxygen (21%), and argon (0.93%).
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Nitrogen N2 78.08% Oxygen O2 20.95%
Nitrogen and Oxygen are the two main constituents of air.
Nitrogen & oxygen.
These gases are nitrogen, oxygen, argon, carbon dioxide.
The two most abundant gases in Earth's atmosphere are nitrogen (about 78%) and oxygen (about 21%).
The three most abundant gases in Earth's atmosphere are nitrogen (78%), oxygen (21%), and argon (0.93%).
Gases of the atmosphere were attracted by gravity from the space.
Nitrogen and Oxygen make up nearly 99% of the dry atmosphere.
These gases are: nitrogen (78,084 %), oxygen (20,9476 %), argon (0,934 %), carbon dioxide (0,0314).
these ??? There are no choices to choose from.
Nitrogen N2 78.08% Oxygen O2 20.95%
The most prominent gases are nitrogen (78 percent), oxygen (21 percent) and argon (nine-tenths of a percent).
These gases are nitrogen, oxygen and argon.
Nitrogen and Oxygen are the two main constituents of air.