[yhmillet]

Here is the problem:

Using the Bohr model and given all possible transitions involving n(i) = 5, 4, 3, 2 in a hydrogen atom, determine what combinations (meaning what final and initial values of n) *emit* light in the visible portion of the electromagnetic spectrum. Report the values of n and the wavelenghts and colors of the light. (Hint: ?This is not as evil as it seems, development of a systematic approach will save you a lot of work).

Ok so for this problem I'm pretty sure I need to use E = 2.179 X10^-18 J ((1/n(i)^2)) - (1/(n(f)^2)). I'm really not sure how systematic this is though. I had to miss class for surgery so I'm a bit lost, and any help would be deeply appreciated.

[SPASH]

I am not a chemistry expert, but I believe the below combinations will emit light.  You just need to then use the equation that you already have and calcuate whether or not the light will fall into the visible spectrum.

Possible combinations:

5 ---> 4
5 ---> 3
5 ---> 2
5 ---> 1
4 ---> 3
4 ---> 2
4 ---> 1
3 ---> 2
3 ---> 1
2 ---> 1