Mark Carmona

  • 384

    Aristotle

    Did not believe in Atoms, He developed the theroy that all matter consisted of four elements: Earth, Air, Water and Fire.
  • 460

    Democritus

    Discovered the Atom
  • Dalton

    Made Atomic Theory
  • Crooke

    Made what people call the "Crookes tube"
  • Mendeleev

    Made the Periodic table
  • John Newlands

    He was one of the first, if not quite the first, to propound the conception of periodicity among the chemical elements
  • Jj Thomson

    . He is credited for the discovery of the electron and of isotopes, and the invention of the mass spectrometer
  • Rutherford

    Made a diffrent view of an Atom.
  • Bohr

    Danish physicist who made fundamental contributions to understanding atomic structure and quantum mechanics, for which he received the Nobel Prize in Physics in 1922.
  • chadwick

    discovery of the neutron.