a
He
b
Ne
c
Ar
d
Xe
Explanation
Correct Option
cVideo Explanation
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Discussions (6)
Dave333
4 years ago
Argon is the third-most abundant gas in the Earth's atmosphere, at 0.934% (9340 ppmv).
OluwaTife1236
2 years ago
The answer is argon, which makes up about 1% of the Earth's atmosphere. It's a noble gas, which means it's very stable and doesn't react easily with other elements. It's the third most abundant gas in the Earth's atmosphere, after nitrogen and oxygen
