Question

What is the wavelength of the transition from n=4 to n=3 for Li2+? In what region of the spectrum does this emission occur? Li2+ is a hydrogen-like ion. Such an ion has a nucleus of charge +Ze and a single electron outside this nucleus. The energy levels of the ion are -Z^2RH/n^, where Z is the atomic number


Where do I begin on this Im so confused

Answer 1

Start with the Rydberg equation.

http://en.wikipedia.org/wiki/Rydberg_formula