Q. Which one of the following noble gases is not found in the atmosphere?
- Argon
- Krypton
- Radon
- Xenon
Answer: Radon
A large fraction of gases dissolved in surface and groundwater, mainly N2, O2 and the noble gases He, Ne, Ar, Kr and Xe, originate from the atmosphere.
The six naturally occurring noble gases are helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and the radioactive radon (Rn).
A large fraction of gases dissolved in surface and groundwater, mainly N2, O2 and the noble gases He, Ne, Ar, Kr and Xe, originate from the atmosphere.
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