Atomic theory Through the Ages

By moneyonmymind$$
  • 500

    Democritus

    Democritus
    460-370 B.C.
    He was the one who said " Atoms cannot be created, Destroyed, or futher divided." He aslo said Atoms can move through empty spaces.
  • Aug 25, 600

    Aristotle

    Aristotle
    384-322 B.C.
    Disagreed with Democritus' idea that Atoms move though empty spaces. His ideas about matter took over Democritus.
  • Aug 25, 700

    John Dalton

    John Dalton
    marks beginning of development of modern atomic theory
    took Democritus ideas and revised them based on his own research.
  • Aug 26, 1000

    Robert Millikan

    Robert Millikan
    1868-1953
    Designed oil drop apparatus to tell charge of electron.
  • Aug 26, 1100

    Ernest Rutherford

    Ernest Rutherford
    1871-1937
    Studied how positive particles interact with solid matter. Concluded that Thompson's model was incorrect.
  • Aug 26, 1200

    James Chadwick

    James Chadwick
    1891-1974
    Found Neutrons

  • J.J Thompson

    J.J Thompson
    1856-1940
    Disapproved with Daltons theory. Designed a series of CRT experimentsto determined particles charge tp ,ass ratio.

  • Sir William Crookes

    Sir William Crookes
    1832-1919

    He saw a flash in a green of light in a cathode tube.He also discovered electrons.