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aglo6509
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Homework Statement
The 3s state Na has an energy of -5.14eV. Determine the effect nuclear charge.
Homework Equations
I believe you have to use:
En=-[(13.6eV)Zeff^2]/n^2
The Attempt at a Solution
So since Na is in the 3s state, I think n=3. So:
-5.14eV= -[(13.6eV)Zeff^2)]/9
-46.3eV=(-13.6eV)Zeff^2
Zeff=sqrt(3.40)=1.85
However the answer in the back of the book is giving me 1.14e, could someone show me my mistake?