## Question 1.17

H-Atom ($E_{n}=-\frac{hR}{n^{2}}$)

Emilie Hoffman 1E
Posts: 55
Joined: Fri Sep 29, 2017 7:04 am

### Question 1.17

I know this isn't on the assigned list of problems, but does anyone know how to go about solving it?

1.17: The energy levels or hydrogenlike one-electron ions of atomic number Z differ from those of hydrogen by a factor of Z^2. Predict the wavelength of the transition from n=2 to n=1.

Iris Shim 1E
Posts: 20
Joined: Fri Sep 29, 2017 7:04 am

### Re: Question 1.17

You use the Rydberg Equation (page 7) except you have to multiply the Rydberg equation by Z^2 since the question states that the energy levels differ by a factor of Z^2 from those of hydrogen and the Rydberg equation is used for hydrogen. You use the modified equation to solve for frequency. Then, you use the frequency to solve for wavelength using the formula λ= c/v.