Chemistry dead people project

By AllieAldesron
  • 460

    Democritus

    460b.c 370 b.c
    atoms indestructible, thought there was an 'atom'
    thought atoms were just balls
  • Oct 1, 600

    Thales of Miletus

    600B.C
    Everything came from water
    no atomic, no experiences

  • Sir Issac Newton

    thought all atoms moved around
    no atomic modek
    no experiment

  • John Dalton

    Element made extremely small particles
    Atoms given element, identical in size,mass. Atoms different elements
    Atom different elements combine in whole number ratios, form chemical compound

  • Henri Becquerel

    discovred radioactivity
    atom was a solid ball

  • J.J Thomson

    1897-discoverd electon 2,000 lighter than hydrogen atom
    experiment cathade rays tube
    plum pudding

  • Ernst Rutherford

    Discoverd nusleuc in atoms
    atoms contained nucelus, protons, surrounded by electrons

  • Robert Millikan

    1908-1917
    oil drop experiment
    discoverd charge and mass each element

  • Bohr

    Bohr Model created electrons in atom, orbits energy around nueleus.
    Bohr Theory not all correct

  • Francis Aston

    Found isotope using a mass spectrometer
    formulated whole nuber rule

  • James Chadwick

    Discoverd evidence toward existance of heutrons

  • Aristotle

    384b.c -322 b.c
    not believe atomic theory