I'm still having trouble with this problem, because E = RH (Zeff / n)2 doesn't seem to have units that cancel out. Energy is measured in Joules or eV, but RH is the only thing with units on the other side of the equation, and it has units of m-1. Or maybe I'm using the wrong value of RH... I...
Find the effective nuclear charge of the outermost electron in sodium using its ionization energy.
Ionization energy of sodium = 5.14 eV = 8.23e-19 J
Zeff = Z - S
I tried using the equation Zeff = Z - S, but when I followed all the rules, I found
S = (8*0.85)+(2*1.00) = 8.8
Zeff...