### Chapter 1, Problem #15

Posted: **Sun Oct 09, 2016 3:16 pm**

by **Drishti_Jain_1D**

I understand that #15 in the textbook is supposed to be solved using Rydberg's Equation; however, is it possible to use the equation we covered in class for an H-atom (En = -hR/n^2) in order to solve it? And if not, is Rydberg's Equation given to us on quizzes or tests?

### Re: Chapter 1, Problem #15

Posted: **Sun Oct 09, 2016 9:32 pm**

by **Chem_Mod**

Hey Drishti! Yes, you can solve it using the equation in class. In fact, the Rydberg equation in the book can be derived using the one in class. To do this, assume a change in energy (E1-E2). Plug in the equation for E1 from class and subtract it from the equation for E2.