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The evolution of the atomic theory

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The evolution of the atomic theory

  1. 1. The Evolution of the Atomic Theory By John, Caroline, and Gabi
  2. 2. Greek Observations • • – –
  3. 3. Discovery ofChemical Elements • • – c.1661
  4. 4. Groundbreaking Discoveries on Mass and Energy • • c. 1774
  5. 5. Groundbreaking Discoveries on Mass and Energy • • 1798 - 1806
  6. 6. John Dalton (1766-1844) • • – 1808
  7. 7. Dalton’s Atomic Theory
  8. 8. First Table of Atomic Masses • • •
  9. 9. Avogadro’s Hypothesis • – – 1811
  10. 10. Interpretations of Avogadro’s Hypothesis •
  11. 11. The Electron • • • – 1898 - 1903
  12. 12. Electron Charge – – 1909
  13. 13. Assumptions from Thomson’s Theory • • •
  14. 14. The Plum Pudding Model Negatively charged electrons are randomly distributed “plums” on the positive cloud of cake.
  15. 15. The Nuclear Atom • • • 1911
  16. 16. The Modern Atom • – – –
  17. 17. How to Read an Atomic Symbol • • •
  18. 18. Planck’s Findings: The Foundations of the Quantum Model • • c. 1900
  19. 19. The Photoelectric Effect • • • 1921
  20. 20. The Atomic Spectrum of Hydrogen • • • 1927
  21. 21. The Bohr Model • • • 1913
  22. 22. The Atom’s Quantum Mechanical Model • •
  23. 23. Wave Functions • •
  24. 24. An Overview of the Quantum Mechanical Model • • 1920s

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