Q. Which of the following transitions are not allowed in the normal electronic emission spectrum of an atom?
A) $2s \longrightarrow 1s$
B) $2p \longrightarrow 1s$
C) $3d \longrightarrow 4p$
D) $5p \longrightarrow 3s$
Explanation
(a)
Atoms corresponds to different transitions from higher energy levels to lower energy levels
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.