- 课时1：Unit 2 Chapter 1.1 Shapes of Molecules and ions 31:04
- 课时2：Unit 2 Chapter 1.2 Shapes of Molecules and ions 35:51
- 课时3：Unit 2 Chapter 1.3 intermlecular force 33:59
- 课时4：Unit 2 Chapter 2 Intermediate bonding and bond polarity 37:59
- 课时5：Unit 2 Chapter 16.1 Green Chemistry 33:58
- 课时6：Unit 2 Chapter 16.2 Green Chemistry 37:14
