sophie

Timeline created by sophievz
  • 382

    Aristotle 382 BC

    Aristotle 382 BC
    Aristotle made the four elements.water, fire, earth, air
  • John Dalton

    John Dalton
    The atomic theory was then changed to described the atom more corectly. Dalton's theory has changed alot.
  • JJ Thomson

    JJ Thomson
    In 1897 JJ Thomson showed that there was a mistake the the Dalton's Theroy. Thomson discoverd that there are small particles inside the atom.
  • Rutherford 1909

    Rutherford 1909
    Rutherford started with the Thomson idea that atoms are soft "blobs" of matter, He expected the particles to pass right through gold in a dtraight line.
  • Democritus 440 BC

    Democritus 440 BC
    Democritus belived that you would never end up with a particle that could not be cut up.
  • Rutherford 1911

    Rutherford 1911
    An element such as radium produced the particles. Than the lead stop all of the positive particles except for a small stream aimed at a gold-foiled target.
  • Bohr

    Bohr
    He stuied the way that atoms reach to the light .
  • Schrodinger and Hesienberg

    Schrodinger and Hesienberg
    They explained the nature of electrons in the atom.