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March 30, 2015

March 30, 2015

Posted by **Ashley** on Wednesday, October 30, 2013 at 9:30pm.

- Chem -
**DrBob222**, Wednesday, October 30, 2013 at 9:59pmYou have two problems in one here. The first one is to start with the electron in its ground state and determine to which level (shell) the photon takes it. The second part starts with the electron in that as a starting position gives the wavelength and asks for the final shell.

#1.

delta E = hc/wavelength

Substitute h, c & wavelength and calculate delta E. Then use

delta E = 2.180E18 J x (1/1 - 1/n^2)

The 1/1 is 1/n^2 for the electron in n = 1. The n^2 is the shell to which the electron is being promoted. Substitute and solve for n.

Second part.

delta E = hc/wavelength. Substitute and solve for delta E.

delta E = 2.180E18J x (1/x^2 - 1/n^2)

The n^2 is the shell to which the electron has been promoted from the previous part and the x = the final destination of the electron. Substitute and solve for x, then

- Chem -
**Ashley**, Wednesday, October 30, 2013 at 10:28pmok, i think i got 5 for an answer

do you think this is correct??

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