A bestseller among introductory texts, Zumdahl's "Introductory Chemistry series is a complete teaching system that places a unique emphasis on developing problem-solving skills with a thoughtful step-by-step approach applicable to chemistry and other disciplines. Another important goal of the series is to connect chemistry to real-life experiences, with engaging applications and colorful graphics."Basic Chemistry, 4/e, (Chapters 1-15) provides basic coverage of chemical concepts and applications through acids and bases. Inclusion of acids and bases is new."Introductory Chemistry, 4/e, (Chapters 1-18) expands coverage with the addition of equilibrium, oxidation-reduction reactions, electrochemistry, radioactivity, and nuclear energy. "Introductory Chemistry: A Foundation, 4/e (Chapters, 1-20) includes two chapters which provide a brief introduction to organic and biological chemistry.