The energy level diagram for hydrogen The energy of the most energetically possible photon emitted is
A) 1.5 eV.
B) 1.9 eV.
C) 3.4 eV.
D) 10.2 eV.
E) 13.6 eV.

Question

The energy level diagram for hydrogen  The energy of the most energetically possible photon emitted is
A) 1.5 eV. 
B) 1.9 eV. 
C) 3.4 eV. 
D) 10.2 eV. 
E) 13.6 eV.

Quizplus · Accepted Answer

The energy level diagram for hydrogen shows that the highest energy level is n=∞, and the ground state is n=1. The energy difference between these two levels is the ionization energy (13.6 eV). Therefore, the most energetically possible photon emitted is when an electron transitions from the n=2 level to the n=1 level, releasing energy equal to the difference in energy between the two levels, which is 10.2 eV. Therefore, the correct answer is D.

The Energy Level Diagram for Hydrogen the Energy of the Most