History of Atomic Theory Timeline Quiz
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Questions and Answers

According to Democritus, what did he call the fundamental or basic unit of matter?

  • Particle
  • Element
  • Atom (correct)
  • Molecule

    • What did Aristotle propose as the basic elements of matter?

  • Earth, fire, water, air (correct)
  • Metals, non-metals, metalloids, and noble gases
  • Protons, neutrons, electrons, and photons
  • Carbon, oxygen, hydrogen, and nitrogen

    • Which scientist is credited for adapting Democritus' theory into the first modern atomic model?

  • Democritus
  • J.J. Thomson
  • John Dalton (correct)
  • Aristotle

    • What did John Dalton propose about the atoms of an element in terms of their physical properties?

    <p>They are identical in size, mass, shape, and other physical properties</p> Signup and view all the answers

    Which scientist is credited for discovering the electron using cathode ray tube technology?

    <p>J.J. Thomson</p> Signup and view all the answers

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