Aristotle, Democritus, and Dalton

By Dillon/Ulises
  • Period: 460 to

    Atomic theroy

  • Demoritus
    500

    Demoritus

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

    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.