Question

The energy level diagram for a hydrogen like atom is shown in the figure.
It cannot absorbs a photon of energy

• A. $54.4eV$
• B. $7.56eV$
• C. $48.36eV$
• D. $51eV$

Answer 1

Answer: (A)

$54.4eV$

$\begin{array}{c}\text{When an atom absorbs certain}\\ \text{amount of energy then that absorbed}\\ \text{energy must be the difference of}\\ \text{energy levels in atom.}\\ \text{From all the given options,}54.4ev\\ \text{energy difference is not present.}\\ \therefore \text{It cannot absorb}54.4eV.\end{array}$