CHEM 130 Lecture Notes - Lecture 4: Louis De Broglie, Photon, Bohr Model

• School: U of M
• Department: Chemistry
• Course: CHEM 130
• Professor: Carol Ann Castaneda

Document Summary

If electrons are free flowing, they will go from the negative plate to the positive plate: the lamp is the light source. It must be a particular photon that has enough energy to be ejected = not every photon can do this: there is a threshold of energy that needs to be reached before electrons can be emitted. Increasing the intensity of the light does not increase the possibility of electrons being ejected before the threshold frequency: the light frequency must pass the threshold. Louis de broglie: the wavelength of the particle is, wavelength of a particle = h/mv, m = mass (kg, v = velocity (m/s, continuous and line spectrum, continuous spectrum: all the colors. For hydrogen z = 1, n = 1. Limitations of the bohr model: the model only works for atoms with 1 electron, electrons do not move around the nucleus in circular orbits, transitions between energy levels, e = ef - ei.