Atomic Theory

  • 430 BCE

    Democritus

    This is when Democritus found his Atomic Theory
  • John Dalton

    When Dalton founded this atomic theory
  • Rutherford

    Rutherford stated that the alpha particles emitted by radioactive probes to the unseen atomic structure
  • JJ Thomson

    When Thomson found his atomic theory
  • Period: to

    Erwin Schrödinger

    Developed an Electron Cloud Model for the atomic theory
  • Chadwick

    Said that an atom was composed of positive and negative charged electrons

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