Question

Imagine a lithium atom where the two electrons in the first energy level are at exact opposite sides of the nucleus, and the electron in the second energy level is in line w/ the other electrons, such that the three electrons and the nucleus lie on a straight line. How much work would you need to apply to remove the outermost electron if the atomic radius is 100 pm and the distance between the first and second energy level is 50 pm?

Answer 1

I know the potential formula, just having some trouble setting this up

Answer 2

if e is the fundamental charge of a proton

V_total = -ke/(50pm) + k(3e)/(100pm) + -k(e)/(150pm)?