43:24

Chapter 9: Periodic Properties of the Elements (Part 1 of 3)

1:03:05

Chapter 8: The Quantum-Mechanical Model of the Atom - Part 1 of 2

2:11:45

EM Waves

1:35:47

Cosmology Lecture 1

55:22

Chapter 8: The Quantum-Mechanical Model of an Atom - Part 2 of 2

1:05:04

Chapter 5: Molarity, Solution Dilution, and Solution Stoichiometry

38:02

Chapter 7: Thermochemistry - Part 1 of 3

39:11

Chapter 9: Periodic Properties of the Elements (Part 3 of 3)