Shi Jing Xu wrote:38.) An excited hydrogen atom emits light with a frequency of 1.141 X 10ˉ14 (14th power) Hz to reach the energy level for which n=4. In what principal quantum level did the electron begin?
Now, this is what I did. I figured that it was necessary to find the wavelength first, using the equation λν=c or λ= c/ν.
So my work was (c being the speed of light and ν being the frequency)
λ= 2.9979 x 10ˉ8 (8th power) meters per second/
1.141 X 10ˉ14 (14th power)sˉ
λ= 2.63 x 10ˉ22 (22nd power) meters [with all the other units canceling]
Shi Jing Xu wrote:54.) What is the maximum number of electrons in an atom that can have these quantum numbers?
n= principal quantum number
l= angular momentum
ml= magnetic quantum number
ms=electron spin number
1) n= 0 l=0 ml=0
2) n=2 l=1 ml=-1 ms= -1/2
3) n=3
4) n=2 l=2
5) n=1 l=0 ml= 0
Shi Jing Xu wrote:I got 7.56 X 10^-20 J
Then using delta E= Efin-Ein=RH(1/ni^2-1/nf^2) and plug in nf=4, I am not getting what you have. For some odd reason, I am getting -7.66 X 10^-20
Then suddenly, just as if she had heard nothing of what had been said and almost as if waking up from a dream, she turned to the old man, asking him:
"Then...is your son really dead?"
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