JEE Main 2019 Chemistry question
The noble gas that does not occur in the atmosphere is:
Answer: (D)
Solution
Radon (printed "Ra") is not a normal atmospheric constituent; it is formed by radioactive decay of radium-226.
The noble gas that does not occur in the atmosphere is:
Radon (printed "Ra") is not a normal atmospheric constituent; it is formed by radioactive decay of radium-226.