Q. In the following atoms and molecules for the transition from $n = 2$ to $n = 1,$ the spectral line of minimum wavelength will be produced by
A) Hydrogen atom
B) Deuterium atom
C) Uni-ionized helium
D) De-ionized lithium
Explanation
(d) $\frac{1}{\lambda} = RZ^{2}\left( \frac{1}{1^{2}} - \frac{1}{2^{2}} \right)$
For di-ionised lithium the value of $Z$ is maximum
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.