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Which electro...

Question

Which electronic level would allow the hydrogen atom to absorb a photon but not to emit a photon

A

3s

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B

2p

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C

2s

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D

1s

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Solution

The correct option is D 1s
An electron in ‘1s’ orbital can be excited by providing energy to higher levels, but this electron cannot de-excite, as there are no orbits before first orbit.

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