Hydrogen atom does not emit -rays because

Physics Atomic and Nuclear Physics Karnataka - CET Previous Year Question MCQ (Single Correct)

its size is very small

energy levels in it are very close to each other

it contains only a single electron

energy levels in it are far apart.

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The correct answer is:

X-rays are emitted from an electron is ionised in a level and electrons from higher filled shells make transition to this hole. As atom has a single electron, it cannot emit X-rays. The phenomenon of production decides whether the emitted radiation is -ray and not just the energy region.

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