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Chemistry (275)
CHMA10H3 (108)
Ann Verner (24)
Chapter 2

Chapter 2 - Atoms and Elements

3 Pages
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Department
Chemistry
Course Code
CHMA10H3
Professor
Ann Verner

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Chapter 2 - Atoms and Elements 2.1 Imaging and Moving Individual Atoms - Scanning Tunneling Microscopy (STM) found by Gerl Binning and Heinrich Rohrer, is a technique that can image and move individual atomsmolecules 2.2 Early Ideas about the Building Blocks of Matter - Leucippus (5 century B.C) and Democritus (460-370 B.C) theorized that matter was composed of small, indivisible particles (atomos) Nothing exists except atoms and empty space 2.3 Modern Atomic Theory and the Laws that Led to It - 1789 (Antoine Lavoisier): The Law of Conservation of Mass In a chemical reaction, matter is neither created nor destroyed - 1797 (Joseph Proust): The Law of Definite Proportions All samples of a given compound have the same proportions of their constituent elements - 1804 (John Dalton): The Law of Multiple Proportions When 2 elements (A & B) form 2 different compounds, the mas
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