What were the 2 most abundant gases in the early atmosphere?

Answer 1

The first atmosphere of the earth was probably mostly hydrogen with some simple hydrides such as water vapor, methane and ammonia.

Vulcanism and asteroidal bombardment eventually replaced this with an atmosphere of mostly nitrogen, with carbon dioxide and some of the inert gasses.

Answer 2

Oxygen

Answer 3

The two abundant gases in the early atmosphere were the same as they are now in the modern atmosphere which are nitrogen and oxygen. However certain evidences have been found which prove that the amount of oxygen in the early atmosphere was much greater than it is now. It was believed that the concentration of oxygen was around 33% as compared to the 21% nowadays.

Answer 4

Nitrogen is the most abundant gas in the Earth's atmosphere, followed by oxygen and argon. The atmosphere contains many gases, most in small amounts, including some pollutants and greenhouse gases.

Answer 5

carbon monoxide, hydrogen,nitrogen,ammonia,maethane were present in the early atmosphere.

Answer 6

the gases has made the valcanoes to erupt

Answer 7

Mostly carbon dioxide from volcanoes

Answer 8

Oxygen and carbon monoxide

Answer 9

oxygen and carbon dioxide

Answer 10

This gas is carbon dioxide.