Often a lack of understanding of basic concepts and how they fit together is the major reason students do poorly in chemistry class. This book is for anyone who needs help understanding the most difficult chemistry concepts and tools that will be encountered in a typical high-school level chemistry classes. Whether you are taking it for the first time in high school, have a child who needs help with homework, or just want to find out more about chemistry, this book is for you. Topics include: The Atom The Mole Scientific Notation Significant Figures Unit Conversions Bonding Chemical Reactions Solubility Problem-solving advice, homework tips, and test-taking skills are also included.