This links to pages 12-20 of Topic 1 of the CGP revision guide
What you need to know
Learn It
What are mixtures and how to separate them
Elements, compounds and mixtures
Balancing chemical equations
Balancing equations 2
Filtration and Crystallisation
Simple distillation
Fractional distillation
Chromatography
Atomic structure
Test It! Test-review-improve
For Self-quizzing flashcards see https://www.physicsandmathstutor.com/chemistry-revision/gcse-aqa/atomic-structure-and-periodic-table/flashcards/
1. Complete the summary questions on page 20 of your kerboodle textbook then check your answers with the document below
2. Complete the practice questions on page 21 of your kerboodle textbook then check your answers with the document below
For a collection of C1&C2 linked exam past paper questions see (just those titled 'a simple atomic model') https://www.physicsandmathstutor.com/chemistry-revision/gcse-aqa/atomic-structure-and-periodic-table/ or https://mathsmadeeasy.co.uk/gcse-chemistry-revision/gcse-chemistry-exam-questions-by-topic/
Other practice can be found under C2 where there are question banks covering both C1&C2