You should already be very familiar with the information in Chapter 1, Chapter 2, and Chapter 3 of the textbook. Make sure you review this information before the start of school. Your polyatomic ions should be memorized and you will need to know the first 40+ elements' names from just their symbols. Take a look at your AP Periodic table ... no names.
Unit 1 - Chapters and Sections in Zumdahl
Chapter 1
Chapter 2 - Sections 2, 4-7
Chapter 3 - Sections 1-4 and 6-8
Chapter 7 - Sections 4-13
Chapter 8 - Sections 1, 2 and 4
Khan Academy ........ This is a highly recommended resource by former AP Chemistry students!!
College Board CED AP Chemistry Unit 1