[mslee]

My professor gave us a problem set of problems he thinks we should already know how to do from general chemistry. However, I've never had to calculate ionization energy with the following given information... the problem gives us the wavelength of the radiation that's directed at xenon atoms and gives the speed of electron that's ejected from xenon. Can anyone hint me on where to start?

[mslee]

Actually, I got it 

[jacobcolbert]

You seem good at answering your own questions. But anyways I was curious how to do this. Is it just energy of light minus the kinetic energy of the electron or am i being silly. I love being silly.