Quick Homework Problem on IE

[Shadowness]

Ok, we are asked to find the energy required to remove the first electron on Li using Bohr's equation E= -2.179e-18 (Z) (1/n^2-1/n^2) where n is intial and final energy levels and Z is atomic number. I get 1.634e-18 J/ electron. I convert this moles and I get 9.84e5 J or 984 kJ/mol. But it asks to compare this value to the IE value for Li's first electron, which is 520 kJ/mol. It asks if these values are to be the same. I would assume so, but my math says otherwise. Did I mess up somewhere? Thanks in advanced.

 

edit: Sorry didn't notice the homework help thread. But if any can help here that'd be nice >.<

[ChemSiddiqui]

Please my friend post this in the homework help section otherwise I doubt anyone will help(not that they wouldn't want to) and you be quite dissapointed at that i am sure. Sorry you have to recieve this reply.

[Mr Skeptic]

So, what happens when you move the electron to the infinith orbital (ie, remove the electron from the atom)?