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### Energy emitted from an Electron

Posted: Fri Oct 20, 2017 10:23 am
Hi! I just wanted to clarify if when we are calculating for the energy emitted by an electron that is relaxing from n=5 to n=1, would the initial energy level be n=5 and the final level be n=1? Or would the initial be n=1 and the final be n=5?

### Re: Energy emitted from an Electron  [ENDORSED]

Posted: Fri Oct 20, 2017 10:27 am
Hi Ishan!

The initial energy level should be n=5 because as we've learned, the emission of energy by an electron occurs when that electron relaxes from its excited state down to a lower energy level. So when the electron goes from energy level 5 to energy level 1, energy is emitted and vice versa if it were to go up in energy level (energy is then absorbed).

### Re: Energy emitted from an Electron

Posted: Fri Oct 20, 2017 11:53 am
Also by having the initial energy be at n=5, you get a negative energy in your calculations which is what you want since the energy is being emitted (electron is losing that energy). Just look at the context of the question though.

### Re: Energy emitted from an Electron

Posted: Fri Oct 20, 2017 4:39 pm
When using the Rydberg equation in the form of r(1/N1^2 - 1/N2^2), N1 is always the lower energy level! Even if the electron is jumping from a high energy level to a lower one.

### Re: Energy emitted from an Electron

Posted: Sat Oct 21, 2017 1:12 am
You will get a negative energy because as it moves from n=5 to n=1, it loses energy. But remember that wavelength and frequency will always be positive!