Chemistry Chapter 3 Quiz

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karmwood96
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110695
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Chemistry Chapter 3 Quiz
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2011-10-20 19:02:33
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Chemistry Chapter 3 Quiz
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  1. "Laughing Philosopher"
    1st.
    "Don't"
    Democritus.
  2. What contributions did Democritus make?
    • Atoms are the smallest unit piece of matter
    • "Atomos"
  3. What does the Democritus's model say/look like?
    • Shape/size depend on object.
    • Basic shapes.
    • ex. circle, square, triangle
  4. Who is the father of modern atomic theory?
    Dalton
  5. Father of modern atomic theory
    "Drink."
    Dalton.
  6. His experiement dealt with combining elements to form compounds?
    Dalton
  7. What contributions did Dalton make?
    • Said element are the same shape and had the same matching atoms. (Later found false)
    • Atoms are combined in whole number rations to make compounds
  8. Said element are the same shape and had the same matching atoms. (Later found false)

    Atoms are combined in whole number rations to make compounds
    Dalton's Contributions.
  9. Whose experiment...
    combined elements to form compounds?
    Dalton
  10. All matter has atoms

    The atom is an indivisible sphere
    Dalton's model
  11. What did Dalton's model say?
    • All matter had atoms
    • The atom was an indivisible sphere
  12. Improved Dalton's theory.
    "The"
    Thomson
  13. What was Thomson's experiment?
    Cathode Ray Experiment
  14. What did the Cathode Ray Experiment do?
    • Cathode rays were passed through a magnetic field.
    • Atoms attracted to pos. magnet
    • Ray are negative electrons
  15. Rays are negative what?
    Rays are negative electrons.
  16. Whose experiment...
    was the Cathode Ray Experiment?
    Thomson
  17. What were Thomson's contributions?
    • Subatomic particles
    • Discovered the Electron
  18. What is the "Plum Pudding" Model?
    A nickname for Thomson's model for atoms.
  19. "Bad"
    Becquerel
  20. Who experiment...
    Studied uranium and found that it emitted 'rays' on photographic film?
    Becquerel
  21. What was Becquerel's experiment?
    He studied uranium and found that it emitted 'rays' on photographic film.
  22. Which two scientists don't have a model?
    Becquerel and Chadwick
  23. What were Becquerel's contributions?
    The "rays" were actually radiation later named by Marie Curie
  24. Improved Thomson's theory.
    "Milk"
    Millikan
  25. What was Millikan's experiment?
    The Oil Drop Experiment
  26. Whose experiment...
    was the Oil Drop Experiment?
    Millikan
  27. Whose contributions determined the charge of an electron?
    Millikan
  28. His contribution determined the charge of an electron.
    Millikan
  29. Improved Thomson's Model
    "Right"
    Rutherford
  30. Whose experiment...
    was the Gold Foil Experiment?
    Rutherford
  31. What happened during the Gold Foil experiment?
    • Shot positive alpha particles at a thin sheet of gold foil
    • Most particles went through, while a few deflected
  32. What was Rutherford's experiment?
    Gold Foil experiment
  33. Whose contributions said...
    1. Atoms are mostly empty space
    2. Atom have a small, dense, positively charged center (Nucleus)
    Rutherford
  34. During the Gold Foil experiment, 9,999 alpha particles out of 10,000 went straight the gold foil. What can be concluded?
    Atoms are made of empty space
  35. During the Gold Foil experiment, 1 out of 10,000 alpha particles were dramatically deflected What can be concluded?
    Atoms had a dense, positively charged center (Nucleus).
  36. What did Rutherford's contribution say?
    • Atoms are mostly empty space
    • Atoms have a small, dense, positively charged center (Nucleus)
  37. Improved on Rutherford's atoms
    "Before"
    Bohr
  38. Whose experiment...
    1. Added energy to atoms
    2. Studied spectral lines
    Bohr
  39. What was Bohr's experiment?
    • He added energy to atoms
    • Studied spectral lines
  40. What was Bohr's contribution?
    Electrons are in fixed energy levels (called orbits) around nucelus
  41. What are orbits?
    The energy levels around the nucleus in which electrons are fixed in

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