Atomic Theory Timeline

  • 460 BCE

    Democritus

    Democritus
    Democritus was a Greek philosopher who thought the Atom was a ball but his idea what remembered for 2000 years.
  • 384 BCE

    Aristotle

    Aristotle
    Aristotle was a Greek philosopher who thought each atom was made of one of the five elements
  • John Dalton

    John Dalton
    He was an English chemist who first thought atoms made everything and also thought the atom was a ball
  • J.J. Thomson

    J.J. Thomson
    He was an English Physicist who created the Plum Pudding model which was a model of positively charged electrons in a positively charged "soup"
  • Ernest Rutherford

    Ernest Rutherford
    He was a New Zealand Physicist who thought that J.J. Thomson was wrong and that the centre was positively charged and the negative electrons circled around the centre
  • Niels Bohr

    Niels Bohr
    He was a Danish physicist who thought the centre was called The ''Nucleus'' and the negative protons moved around it like a solar system
  • Erwin Schrödinger

     Erwin Schrödinger
    Erwin Rudolf Josef Alexander Schrödinger was an Austrian physicist who used maths to find an electron in the model of an atom.
  • Werner Heisenberg

    Werner Heisenberg
    Werner Heisenberg was a German Physicist who figured out that we can`t know both the energy and the position of an electron.