Question

What is the third by volume, after nitrogen and oxygen, component of dry air?

Answer 1

hey...there.

Argon represents 0.934% of the earth's atmosphere and 1.28% of its mass. Ar-40 is an isotope that makes up the majority of the earth's argon. It is a result of decaying of another elements' unstable isotopes, mainly Potassium-40.
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Answer 2

nitrogen

oxygen

argon

carbon dioxide

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