Aristotle, Democritus, and Dalton

By Dillon/Ulises
  • Period: 460 to

    Atomic theroy

  • 500

    Demoritus

    Demoritus
    460 B.C - 370 B.C
    Demoritus revolutionized the Atom. He stated that there were little moving particles in Matter called Atomos.
  • Aug 25, 600

    Aristotle

    Aristotle
    384 B.C - 322 B.C
    (Earth, Wind, Fire, and Air) Aristotle denied the existence of the atom.

  • John Dalton

    John Dalton
    1766 A.D - 1844 A.D
    John Dalton revived the atom. He took Democritus idea and added more detail

  • J.J. Thompson

    J.J. Thompson
    proposed a model of the atom that consisted of a spherically shaped atom composed of a uniformly distributed positive charge.

  • Robert Millikan

    Robert Millikan
    Determined that the magnitude of the charge of the electron was 1.602x10-19 coulombs.

  • Ernest Rutherford

    Ernest Rutherford
    concluded that Thomson’s plum pudding model of the atom was incorrect.

  • James Chadwick

    James Chadwick
    Rutherford refined his concept of the nucleus to include that it contained positively charged particles called protons.

  • Sir William Crookes

    Sir William Crookes
    noticed a green flash of light within a cathode ray tube while working in a dark laboratory.