Question

Can someone please answer, I have absolutely no idea! The image is linked.

An atom of a fictional element has the energy level diagram shown below. Which line will not appear on the total emission spectrum?

http://media.education2020.com/EVresources/GizmoQuestions/EL_MSCH_BohrHyd4.gif

A. 0.9 eV
B. 0.8 eV
C. 0.7eV
D. 0.6 eV

Answer 1

I think answer is D. when an electron in a certain level emits electromagnetic radiation it'll decrease to the lower energy level..
n(6) - n(4) = 0.9 eV
n(4) - n(3) = 0.8 eV
n(5) - n(4) = 0.7 eV
but there is no 0.6 eV energy level difference..so answer should be D