KEY CONCEPTS IN CHEMISTRY:
The Key Concepts topic comes up on BOTH Paper 1 and Paper 2, so it is massively important that you get this right! It's a large part of the GCSE.
Above are revision summary videos for every topic. Get to watching!
Below are revision materials for the entirety of the Key Concepts in Chemistry section.
Below are links to revision materials for the whole of the Key Concepts in Chemistry topic: