National 5 study guide: Contains an overview of course with the prelim key areas highlighted.
Whole year study guide: Expanded learning outcomes for each key area
BBC have some great resources to use for revision. As do the SQA, here are links to
Key area past paper questions, answers included.
This is also included as a spreadsheet through the SQA. http://www.sqa.org.uk/files_ccc/ChemistrySQPN5PPGuidance.pdf