23:46

Sec 3 Chapter Two Part I Session 1

30:32

Sec 3 Chapter 4 Part I S1

31:12

Sec 2 Term 1 CH 2 S4

37:36

Sec 3 Chapter 4 Part I S2

27:42

Sec 3 Chapter 3 Part II S2

16:50

Sec3 Ch1 REVISION Part 1

21:04

Sec 2 Term 1 CH 1 S3 "Quantum Numbers"

8:05

Prep2 Practical test