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Has anyone done reduced mass of system before???

Hi,

As per the title?

Basically, I have the following question, but I'm kinda struggling:

1) give an eqn for the reduced mass of the Li2+ system, in terms of mass of nucleus and mass of electron.


As Li in it's atomic state has 3 electrons, and 4 protons+3 nuetrons, and Li2+ has 1 e- and same nuclear contents I've put it as:

u = (Me.7Mn)/(Me+7Mn)

Where Me = mass of electron, and Mn = mass of nucleus

2) Hence calculate the reduced mass and a more accurate energy for n=4 for Li2+

I've calculated the reduced mass to 9.108x10^-31 which I've plugged into R = (e^4.u)/8.Eo^2.h^3.c) but I keep getting the top to be 0... for some reason.

I know the equation, and I know the theoretical method for calculating it, but I'm missing something, and I don't know why :frown:

If anyone can help it'd be greatly appreciated.
Thanks
Ourkid

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