What Is the Binding Energy of an Electron in a Photosensitive

Multiple Choice

What is the binding energy of an electron in a photosensitive metal (in kJ/mol) if the longest wavelength of light that can eject electrons from the metal is 205 nm?

A) 279 kJ/mol
B) 584 kJ/mol
C) 792 kJ/mol
D) 1.71 $\times$ 10¹⁹ kJ/mol
E) 5.84 $\times$ 10^-20 kJ/mol