Scientists Contributing to Atomic Theory

  • 440

    Democtritus

    Democtritus
    Discovered the atom which is a particle that could not be divided. he said they were small, gard particles.
  • Dalton

    Dalton
    Wanted ti=o know why elements combine in certain proportionsbased on mass to formcompounds.He used the model call Solid Spheres.
  • Dmitri Mendeleev

    Dmitri Mendeleev
    Developes a periodic table that organizes the element known at the time.
  • Thomson

    Thomson
    Showed that there was a mistake in Dalton's theory. He discovered that there are small particles inside the atom. This means they could be divided.
  • Rutherford

    Rutherford
    Designed an experiment to study the parts of the atom to test Thomson's theory.
  • Bohr

    Bohr
    Proposed that electrons move around the nucleus in certain paths, or energy level.
  • Scanning Tunneling Microscope

    Scanning Tunneling Microscope
    Scientists in Switzerland develope a scanning tunneling microscope, which is used to see atoms for the first time.
  • Update Periodic Table

    Update Periodic Table
    Another element is added to the periodic table after a team of German Scientists synthesize an atom containing 112 protonsin its nucleus.
  • Electron Beam Technology

    Electron Beam Technology
    Researchers use electron beam technology to create a tiny silicon transistor that is only 80 atoms wide and that can run at speeds of almost 20 gigahertz.