here is the syllabus, i guess its like a revision list provided directly from edexcel. You're doing edexcel, no cambrigde right? If you are doing cambrigde igcse then go to the site and click on the specification or syllabuls you should be able to download.
btw the link i have given you contains the other science too so you might have to scroll down to chemisty. other than that you're fine. go through the sections read and make notes.