[itsme03]

is this problem really as simple as it seems?

E_n = -R_H/n²

where R_H is 2.180 x 10 ^-18 J and n is the principle quantum number of the energy level. the energy of an electron that has been removed from the atom is 0J. Calculate the amount of energy required to remove an electron from the n=1 energy level of a hydrogen atom (energy _final- energy_initial).

isnt the answer just -2.180 x 10^-18?

[Borek]

Looks like.

You may confront it with

http://en.wikipedia.org/wiki/Rydberg_formula

Funny that I have just been to that page to answer someones elses question.