Question:
Which is the most abundant gas in the atmosphere?
AOxygen
BNitrogen
CCarbon Dioxide
DHydrogen
Answer:
B. 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 0.93%.