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เนื้อหาย่อ : When I wrote the preface for the previous edition of this book, I considered the chal- enges of preparing students in a rapidly changing, technology-driven time in our his- ory. A few years later, the challenges remain the same: How do we inspire and instruct students about the basic facts of chemistry, while taking advantage of all that tech- ology has to offer? The answer is clear: We use many tools, and extract the best that each tool can offer. Technology can push learners to visualize chemistry and explore deas in an interactive environment. But before that exploration, students need to build foundation, a framework for ideas. The textbook is still the best tool for students use as they learn new concepts in chemistry. The strength of the seventh edition is the integration of various tools that truly designed to inspire both students and instructors. The textbook is the foundation for e technology. The technology, most totally new for the seventh edition, takes students eyond the confines of the traditional textbook. I hope that the revisions to the seventh edition and technology answer many of your challenges as you teach general chemistry. New to the Seventh Edition Totally new technology tools, described on the following pages of this preface, include ㆍ Essential Study Partner (ESP) interactive student tutorial . e-Text 2.0 OnLine Learning Center website for instructors and students ㆍWebCT Course created specifically for Chemistry, Seventh Edition, for instructor course management PageOut for instructor course management ㆍPowerPoint Lecture Presentation created specifically for Chemistry, Seventh Edition ㆍVisual Resource Library of all illustrations and photographs for Chemistry, Seventh Edition Chemistry Animations Visual Resource Library for instructor presentations ㆍNew molecular art images were created using the Spartan molecular modeling program. These drawings enable students to gain a better understanding of the three-dimensionality of molecules and the details of chemical reactions. Much of the art program is revised or new, with emphasis on pedagogical use of color. For examples, see the art key in the back end paper, and Figures 5.6, 5.14, 10.6, 13.26, and 25.13. A new periodic table icon illustrates the properties of elements according to their positions in the periodic table. ㆍ Many "Worked Examples" have been revised to more clearly show steps in problem solving. ㆍ New "Chemistry in Action' essays have been added and many others have been updated.