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BobMcPhysics
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Homework Statement
Find the energy in electron-volts required to remove the remaining electron from a doubly ionized lithium (Li2+) atom.
Homework Equations
En=-z^2/n^2
The Attempt at a Solution
I thought z was 3 for lithium, that doesn't work. I thought since there was only one remaining electron you could treat it like Hydrogen and use z (or E1) = -13.6 eV but that's not right either. Clearly the n in the denominator is 1 from above.
I'm lost!