## Lec 21. Bigger Atoms, Hund's Rules and the Aufbau Principle

#### Lec 21. Quantum Principles -- Bigger Atoms, Hund's Rules and the Aufbau Principle --

Instructor: A.J. Shaka, Ph.D

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

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