Picture of the atom

The History Of The Atom

  • 400 BCE


    Democritus was basically saying the opposite of what Aristotle said he said that there has to be an end eventually.
  • 384 BCE


    Aristotle said that anything can be divided infinitely even atoms.
  • John Dalton

    John Dalton
    a short summary of what John Dalton is that he discovered that atoms are the smallest of things they can not be broken down any farther.
  • William Conrad Roentgen

    William Conrad Roentgen
    William Conrad Röntgen discovered the X-Ray.
  • J.J. Thomson

    J.J. Thomson
    JJ Thomson discovered a new model and called it "Plum Pudding" if you've never had plum pudding o never herd of this before let me clear things up. he discovered that electrons cant just be there because there negative and you need a positive substance to balance it out so he thought that the electrons were in a bunch of positive substance like plums in plum pudding.
  • Hantaro Nagaoka

    Hantaro Nagaoka
    he made a proposal of the first model with a small nucleus surrounded with a with a ring of electrons.
  • Ernest Marsden

    Ernest Marsden
    Ernest Marsden discovered the nucleus from Rutherfords experiment or using the Gold Foil experiment.
  • Ernest Rutherford

    Ernest Rutherford
    Ernest Rutherford discovered the nucleus and that the atom is mostly empty space.
  • Niels Bohr

    Niels Bohr
    Niels Bohr discovered the shells because he knew something was wrong about the atom because the electrons would have sunk into the nucleus.
  • Henry Moseley

    Henry Moseley
    he provided the first experimental evidence of Niels Bohr.