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Chapter 4 - Atomic Structure
Notes on
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Atoms
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History of the Atom
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The discovery of the electron…
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J.J. Thomson’s Model
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Rutherford and the nucleus
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Parts of an Atom
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Parts of an Atom: Particle charge mass location Proton Neutron
Electron
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Quarks
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Atomic Number
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Mass Number
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Atomic Mass Units
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Mass of an Atom
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Isotopes
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Isotopes of Hydrogen Hydrogen-1 Hydrogen-2 Hydrogen-3 mass = 1
Hydrogen has three isotopes: Hydrogen-1 Hydrogen-2 Hydrogen-3 Hydrogen-1 Hydrogen-2 Hydrogen-3 mass = 1 1 proton 0 neutrons Atomic # =1 Atomic # =
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Bohr Model vs. Rutherford Model
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What is an energy level?
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Energy Levels and the Atom
Energy Level Diagram
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Important Energy Level Rules
Potassium - 19 total electrons 1 level rd level - 8 2nd level th level - 1
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The Electron Cloud Model
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Atomic Orbitals
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Can we see atoms?
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STM Images of an Atom
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