Data Interpretation and Analysis, a new category of end- of- chapter questions has been added to each chapter. These questions present actual data from real-life situations and ask students to analyse and interpret that data. They are designed to give students much- needed practice in reading graphs, understanding tables, and making data-driven decisions. 13 new Conceptual Checkpoint questions have been added throughout the book. Conceptual Checkpoints reinforce conceptual understanding of the most complex material. Strategically located throughout each chapter, they prompt students to think about concepts and solve problems without doing any math. Answers and explanations appear at the end of each chapter. Key Learning Outcomes correlate to the Chemical Skills and Examples in the end-of-chapter material and to the content within Mastering Chemistry. Each section in every chapter (after the introductory sections) includes at least one learning outcome summarising the key learning objective to help students focus and assess their progress. Self-Assessment Quizzes at the end of each chapter provide opportunities for students to assess what they’ve learned. Each quiz consists of 10—15 multiple-choice questions similar to those found on standard exams. Multipart molecular images depicted through Macroscopic, Microscopic, and Symbolic perspectives enable students to better visualise, and thus understand, chemistry. The art program has been further refined and improved, making the visual impact sharper and more targeted for student learning. The art program has been modified to move information from the captions and into the art itself. This allows relevant information to be placed right where it is most needed and makes the art a more accessible study and review tool. 39 Interactive Worked Examples instruct students how to break down problems using Tro’s “Sort, Strategize, Solve, and Check” technique in an interactive, digital format. These problems are incorporated in Mastering Chemistry as assignable activities. In the ‘Strategize’ step for many examples, students are prompted to draw a solution map for the problem. Students learn how to use conversion factors and equations to outline the steps needed to get from the given to the unknown. Examples are presented in formats that foster problem-solving skills and enable understanding. Every worked example is followed by at least one similar, but un-worked, skill-builder exercise, which allows students to immediately put into practice the problem-solving techniques they just learned. The For More Practice features, which follow every worked example, links to additional in-chapter examples and end-of-chapter problems, providing opportunities for students to practice relevant skills. In-text cross-references to the math index appear throughout the text, to make sure students are aware that math help is available right at their fingertips. The data throughout the book has been updated to reflect the most recent measurements and developments available. Text in all chapters has been edited for clarity and to limit use of passive voice and extraneous words and phrases.