Question

What is the most abundant gas in the Earth's atmosphere?
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Answer 1

Answer:

nitrogen

The most abundant gas in the atmosphere is nitrogen, with oxygen second. Argon, an inert gas, is the third most abundant gas in the atmosphere.

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Answer 2

Answer:

Nitrogen

Explanation:

The most abundant naturally occurring gas is Nitrogen (N2), which makes up about 78% of air. Oxygen (O2) is the second most abundant gas at about 21%. The inert gas Argon (Ar) is the third most abundant gas at the atmosphere.