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Which of the following noble gases do not occur in the elemental state in the atmosphere?(a) Helium(b) Neon(c) Argon(d) RadonI have been asked this question in an internship interview.This is a very interesting question from P-Block in portion P-Block Elements of Chemistry – Class 12

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Right ANSWER is (d) RADON

Explanation: Radon is the last-named member of the 18^th group of elements in the periodic table. It is radioactive in natureand as a result, all other noble gases except radon OCCUR in the elemental STATE in the atmosphere.



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