Discussion:
Photoelectric effect and energy of ejected electrons
The work function of an element is the energy required to remove an electron from the surface of the solid. The work function for cadmium is 378.2 kJ/mol (that is, it takes 378.2 kJ of energy to remove 1 mol of electrons from 1 mol of Cd atoms on the surface of a sample of cadmium.)
Q1: What is the maximum wavelength of light that can remove an electron from an atom in cadmium? (ans in nm.)
Q2: If solid cadmium is irradiated with 217-nm light, what is the maximum kinetic energy that a released electron can have? (ans in J.)