CHM135H1 Lecture Notes - Lecture 5: Wave Function, Angular Momentum, Electron Configuration

• School: UTSG
• Department: Chemistry
• Course: CHM135H1
• Professor: Gilbert Walker, Eugenia Kumacheva, Kristine Quinlan

Document Summary

Chm135 lecture 5: electronic structure of atoms. September 17, 2018 (relevant reading chemistry 7ed mcmurry/fay/robinson, chapter 5) Used to construct solutions for multiple electron systems. H- wavefunctions slightly perturbed due to electron interactions. As n increases, the size and number of nodes increase. There three 2p orbitals; each one has one node: the orbitals can lie along x axis, along y axis, or between the two axes, can fit 6 electrons in the three orbitals 2 electrons per orbital. There are five 3d orbitals; each one has two sets of nodes: on xyz plane, can fit 10 electrons in 5 orbitals 2 electrons per orbital. For a one-electron system, the s, p, d orbitals are degenerate (have the same energy) Polyelectronic atoms for many-electron atoms, same orbital shapes are used as in for hydrogen (it"s an approximation but a good guess) Different orbitals with same n are not degenerate; two factors determine energy: 1) electron-nucleus attractions, 2) electron-electron repulsions, e. g.