Electron Binding Energy

[McMaster_Girl]

Ok, so the question is:

A metal has a threshold wavelength for the onset of the photoelectric effect of 662 nm. What is the binding energy (kj/mol) of an electron to the metal surface.

I used E=hv to get the photon energy, so is that the binding energy as well? If so, how do i convert it to kJ/mol, do i use avagadro's number?

Any help is appreciated, thanks!

[marcusl]

Yes and yes! You have this one nailed.

[Repetit]

To convert it to kJ/mole you first convert the result from E=hv to joules and the multiply the result by Avogadros number.