A revision video for the Chemistry Paper 1 of AQA GCSE Combined Science (9-1) (8464), covering:
Unit 1 (Atomic Structure and the Periodic Table)
Unit 2 (Structure and Bonding)
Unit 3 (Quantitative Chemistry)
Unit 4 (Chemical Changes)
Unit 5 (Energy Changes)

This will also be useful for GCSE Chemistry (8462) but doesn't cover everything needed for the 'Triple Science' exams.