This book is a product of the effective learning materials developed over years by Dr. Jang to both introduce a new student to the subject and remedy any test-taking weaknesses for the SAT Chemistry subject test. This book has more contents, practice problems, and mock tests than most SAT Chemistry books on the market. It covers all the material needed for the SAT subject test in Chemistry. This book can also be a great study guide for your honors and AP Chemistry classes. In addition to a thorough overview of materials, this book provides over 2000 practice problems to reinforce your understanding of the material and pinpoint your weak areas that need improvement. We include ten mock tests at the end of this book, which is more than any other SAT Chemistry book available. The ten mock tests provided closely mimic the actual. By taking these mock exams with a timer under test-like conditions, students will be even more prepared to master the real test. All questions in this book have been answered with detailed key concepts explained on the side so that you can check your answer and reinforce your weak areas. This book includes a diagnostic test that contains 90 questions in 56 topics that are covered on the SAT subject test in Chemistry. The purpose of the diagnostic test is to allow you to measure your level of proficiency and identify your weakest areas.