Which electron level would allow the hydrogen atom to absorb a ph… - Vidyadip

MCQ

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

A
$3s$
B
$2p$
C
$2s$
✓
$1s$

✓

Answer

Correct option: D.

$1s$

d
$1s$ electronic level would allow the hydrogen atom to absorb a photon but not to emit it. On absorption of radiation, electron will be transferred from is level to higher level such as $2 s$ or $3 s$. But to emit a photon, the electron should go to the lower energy level from higher energy level. Since is is the lowest energy level, the electron cannot go to a lower level. Hence, emission is not possible.

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