Chapter 5 Notes - Chapter5Notes I. A.EarlyClassification...

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Chapter 5 Notes I. Historical Development of the Atomic Theory A. Early Classification 1. Is matter discrete or continuous? Discrete Items: pages in a book, days in a year Continuous items: Number line , time 2. Greek idea of Matter(400 B.C. Democritus) 1st atomic theory: "the fundamental building blocks of matter are indivisible atoms" Believed matter consisted of: Earth(solid) Water(liquid) Air(gas) Fire(energy) B. The beginnings of Modern Chemistry Law of Definite Composition: When elements combine to form a specific compound they react in a fixed proportion by mass. Table Salt: sodium chloride NaCl Na= 39.32g Cl=60.68g H_20 H= 11.1 g Definite Composition O= 89.9 g CO_2 Carbon Dioxide 27.29% Carbon 72.71% Oxygen
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1. Law of Conservation of Mass C. Dalton's Atomic Theory-John Dalton, 1803-08 1. Postulate of Dalton's Atomic Theory. .. 1. Each element is made up of tiny, individual particles called atoms. 2. Atoms are indivisible; they cannot be created or destroyed. 3. Al atoms of each element are identical in every respect.
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This note was uploaded on 04/08/2009 for the course CHM 109 taught by Professor Staff during the Fall '08 term at Grand Valley State.

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Chapter 5 Notes - Chapter5Notes I. A.EarlyClassification...

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