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Energy emitted from an Electron

Posted: Fri Oct 20, 2017 10:23 am
by Ishan Saha 1L
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
by Seth_Evasco1L
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
by Leah Thomas 2E
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
by Manasvi Paudel 1A
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
by Rachel N 1I
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!