The Ionization Energy Is the Energy Needed to Remove an Electron

Multiple Choice

The ionization energy is the energy needed to remove an electron from an atom. In the Bohr model of the hydrogen atom, this means exciting the electron to the n =  state. What is the ionization energy in kJ/mol, for hydrogen atoms initially in the n = 2 energy level?

A) 290 kJ/mol
B) 328 kJ/mol
C) 656 kJ/mol
D) 983 kJ/mol
E) 1311 kJ/mol