By Kenneth W. Whitten, Raymond E. Davis, Larry Peck, George G. Stanley

The Qualitative research chapters at the moment are on hand in a convenient paperback complement, ideal for bundling with the middle textual content, CHEMISTRY, 8th variation, or to be used as a standalone merchandise.

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At the present time, we have not (knowingly) observed the transformation of energy into matter on a large scale. It does, however, happen on an extremely small scale in “atom smashers,” or particle accelerators, used to induce nuclear reactions. Now that the equivalence of matter and energy is recognized, the Law of Conservation of Matter and Energy can be stated in a single sentence: Einstein formulated this equation in 1905 as a part of his theory of relativity. Its validity was demonstrated in 1939 with the first controlled nuclear reaction.

We understand simple chemical systems well; they lie near chemistry’s fuzzy boundary with physics. They can often be described exactly by mathematical equations. We fare less well with more complicated systems. Even where our understanding is fairly thorough, we must make approximations, and often our knowledge is far from complete. Each year researchers provide new insights into the nature of matter and its interactions. As chemists find answers to old questions, they learn to ask new ones. Our scientific knowledge has been described as an expanding sphere that, as it grows, encounters an ever-enlarging frontier.

Davis, University of Texas at Brownsville Randall Davy, Liberty University Travis D. Fridgen, Wilfrid Laurier University Donna S. Hobbs, Augusta State University Olivier Marcq, American University Toni McCall, Angelina College Stephanie Myers, Augusta State University Scott W. Reeve, Arkansas State University Shashi Rishi, Greenville Technical College Jimmy R. Rogers, University of Texas at Arlington Alka Shukla, Houston Community College Shyam S. Shukla, Lamar University Thomas R. Webb, Auburn University Reviewers of the First Seven Editions of General Chemistry Edwin Abbott, Montana State University; Ed Acheson, Millikin University; David R.

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