CHEMISTRY · Subjective · CBSE · Chemistry · Structure of Atom · Structure of Atom
Problem
In the spectrum of singly-ionised helium (He+), consider all possible transitions that end at the orbit with principal quantum number n=3. The highest populated orbit involved in these transitions is n=7.
(i) Calculate the longest wavelength that can appear among these lines.
(ii) State whether this wavelength lies in the ultraviolet, visible, or infrared region of the electromagnetic spectrum. Use RHe+=4RH and RH=1.097×107m−1.