Atomic Theory Timeline

  • 442 BCE

    Democritus

  • 428 BCE

    Anaxagoras and Empedocles

  • 332 BCE

    Aristotle

  • John Dalton

  • Marie and Pierre Curie

  • J.J. Thomson

  • Robert Millikan

  • Ernest Ruthford

  • Neils Bohr

  • Erwin (Ernest) Schrodinger 1926

  • Werner Heisenberg

  • James Chadwick