Question

The most abundant noble gas in atmosphere is

• A. He
• B. Ar
• C. Xe
• D. Rn

Hint:

Argon is the most abundant noble gas in the Earth's atmosphere and is often used in light bulbs and as a protective atmosphere for welding.

Answer 1

The Correct Option is B

Step 1: Identify the noble gases in the atmosphere.
The noble gases in the atmosphere include helium (He), argon (Ar), xenon (Xe), and radon (Rn).
Step 2: Understand the abundance of noble gases.
Argon (Ar) is the most abundant noble gas in the Earth's atmosphere, constituting approximately 0.93% by volume of the atmosphere. Helium, while abundant in the universe, is much less common in the Earth's atmosphere.
Step 3: Apply to the options.
Argon (Ar) is the most abundant noble gas in the atmosphere, so the correct answer is (B).
Final Answer: \[ \boxed{\text{Ar}} \]