CHEM209 Study Guide - Midterm Guide: Statistical Weight, Bond Length, Trigonal Planar Molecular Geometry
9 Aug 2016
School
Department
Course
Professor
Document Summary
Selection rule: n is unrestricted, l = +/- 1 for symmetry reasons, ml = 0, +/- 1. Conservation of angular momentum and symmetry give rise to selection rules. Black-body radiation: materials emit light whose wavelength is a function of temperature; intensity distribution is independent of material based on colours, should be able to tell the surface temperature [lowest temp to highest temp = roygbif] Planck"s constant, h: constant part of planck"s law which assumes energy is emitted in finite increments. The photoelectric effect: # of e- s increases with light intensity but kinetic nrg. Unaffected; kinetic nrg increases with frequency; below v0, no e- emitted. The bohr model: assumes stationary state, introduces correspondence principle, emitted light carries energy associated with transition between two energy levels. Node: for nth, energy level/wavefunction: has n extrema and (n-1) internal nodes. Nodal surface: probability of finding an e- here is zero!
