Question

Which gases initially present in the earth atmosphere?

Answer 1

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Hydrogen and Helium

Earth is believed to have formed from gas and dust orbiting the sun. The vast majority of the gas would have been composed of the lighter elements, such as hydrogen and helium. The early Earth had a large amount of hydrogen and helium in the atmosphere and this would have slowly escaped into space due to the low mass of these gases. Today, hydrogen and helium make up less than 1 percent of the Earth's atmosphere.



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Answer 2

The earth's atmosphere is mainly made up of four gases: nitrogen (78%), oxygen (21%), argon (0.93%), carbon dioxide (0.38%). Small amounts of water vapour and other gases are in the atmosphere as well. Originally Answered: Which gases make up to the Earth's atmosphere?