1.

Which electronic level would allow the hydrogen atom to absorb a photon but not to emit a photon ?A. 3 sB. `2 p`C. 2 sD. 1 s

Answer» Correct Answer - D
(d) Energy is emitted when electron falls from higher energy level to lower energy is absorbed when electron moves from lower level to higher level.
`1s` is the lowest energy level of electron in an atom.
`:.` An electron in `1 s` level of hydrogen can absorb energy but cannot emit energy.


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