This new updated edition of CHEMISTRY: PRINCIPLES AND REACTIONS retains the same focus, providing students with the "core" material essential to understanding the principles of general chemistry ? but now gives them a unique online assessment and learning tool through the General ChemistryNow web-based system. Topics in Organic Chemistry have also been expanded to provide material for those who want to include this coverage in their course. Masterton and Hurley cover the basics without sacrificing the essentials, appealing to several markets. Appropriate for either a one- or two-semester course, CHEMISTRY: PRINCIPLES AND REACTIONS, Fifth Edition is three hundred pages shorter than most general chemistry texts and lives up to its long-standing reputation as THE student-oriented text. Though this text is shorter in length than most other General Chemistry books, it is not lower in level, and with the addition of the large volume of content provided by the revolutionary GENERAL CHEMISTRY INTERACTIVE 3.0 CD-ROM, and, the addition of the new General ChemistryNow web-based program that is included with every copy, it has a depth and breath rivaling much longer books.