AtomicStructureNotes

AtomicStructureNotes - Atomic Structure A. History: The...

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Atomic Structure A. History: The Atom 1. Democritus (450 B.C.) a. Postulated all things are composed of tiny indivisible particles called atomos. b. Atoms 1. Smallest particle of an element that retains the chemical properties of that element. 2. John Dalton (1803) a. Atomic Theory 1. Each element is composed of extremely small particles called atoms. 2. All atoms of a given element are identical, but they differ from those of any other element. 3. Atoms are neither created or destroyed in any chemical reaction (Conservation of Mass by Joseph Proust). 4. A given compound always has the same relative numbers and kinds of atoms. B. Discovering the Structure of the Atom 1. Ben Franklin a. Studies in static electricity and electricity.
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2. J.J. Thomson (1846) a. Cathode Ray Tubes and magnets. b. Discovered electrons.
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c. Thomson's Plum Pudding Model 3. Marie and Pierre Curie (1896) a. Radioactivity b. Lead to discovery of neutrons and protons. C.
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AtomicStructureNotes - Atomic Structure A. History: The...

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