Bigger Atoms, Hund's Rules and the Aufbau Principle 
Bigger Atoms, Hund's Rules and the Aufbau Principle
by UC Irvine
Video Lecture 21 of 28
Copyright Information: Shaka, A.J. Quantum Principles 131A (UCI OpenCourseWare: University of California, Irvine), [January 20, 2015]. License: Creative Commons Attribution-ShareAlike 3.0 United States License. (
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Date Added: January 29, 2015

Lecture Description

Recorded on February 27, 2014.

Index of Topics:
1:22 Closed Shell Atoms
5:12 The Energy of an Atom
7:20 One and Two-Electron Integrals
8:47 Fock's Contribution
13:40 Optimized Orbitals Are Online
14:57 Who Was Roothaan?
18:48 Optimized Orbitals Are Online
22:17 The Most Stable Atom
24:45 Hund's Rules
29:22 The Basis of Rule #1
32:31 The Basis of Rule #2
33:54 The Basis of Rule #3
36:08 Predicting Stability
37:31 Practice Problem 27
39:02 The Aufbau Principle
43:29 The Periodic Table
45:20 A Cautionary Note
48:17 "Fission!"
50:09 Chemical Bonds

Course Index

Course Description

This course provides an introduction to quantum mechanics and principles of quantum chemistry with applications to nuclear motions and the electronic structure of the hydrogen atom. It also examines the Schrödinger equation and study how it describes the behavior of very light particles, the quantum description of rotating and vibrating molecules is compared to the classical description, and the quantum description of the electronic structure of atoms is studied.


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