CHEM 130 Chapter 2: Chapter 2 Review
Document Summary
Can be viewed as a stream of particles called photons, each with energy (planck"s constant)*(nu) When light strikes a metal surface, electrons are emitted. Analysis of the kinetic energy and numbers to of the emitted electrons led. Einstein to suggest that electromagnetic radiation can be viewed as a stream of photons. The emission spectrum of hydrogen shows discrete wavelengths. Indicated that hydrogen has discrete energy levels. Using the data from the hydrogen spectrum and assuming angular momentum to be quantized, bohr devised a model in circular orbits. Although an important pioneering effort, this model proved to be entirely incorrect. An electron is described as a standing wave. The square of the wave function (orbital) gives a probability distribution for the electron position distribution for the electron position. The exact position of the electron is never known, which is consistent with the. It is impossible to know accurately both the position and the momentum of a particle simultaneously.
