History of the atom

By john.benham
  • Feb 20, 1000

    democritus 400 BC

    democritus 400 BC
    Democritus thought that atoms could not be seprated. He made this discovery by observing atoms.
  • Feb 20, 1000

    Aristotle 340 BC

    Aristotle 340 BC
    He descovered that atoms make up everything and can not be created our destoryed. He came to this conclusion gathering his evidence through his observations of his experiments. Walker, Jim. "History of Atoms." History of Atoms. Nobelifs, 1 Nov. 2004. Web. 19 Feb. 2014.

  • Dalton

    Dalton
    He discovered that all matter is made up of atoms. He also said that atoms are invisible and industructable. He did not know what the structure looked like. Walker, Jim. "History of Atoms." History of Atoms. Nobelifs, 1 Nov. 2004. Web. 19 Feb. 2014.

  • Thomson

    Thomson
    He discovered that electrons have a negative charge and that protons have a positive charge. He used his experiments to back his theroies. Made the rasins in pudding model. Walker, Jim. "History of Atoms." History of Atoms. Nobelifs, 1 Nov. 2004. Web. 19 Feb. 2014.

  • Rutherford

    Rutherford
    He discovered that positive charged particals defect alpah waves. He used an experiment that shot alpha waves at a atom to back his discovery. Walker, Jim. "History of Atoms." History of Atoms. Nobelifs, 1 Nov. 2004. Web. 19 Feb. 2014.

  • Bohr

    Bohr
    He discovered that electrons can only orbit certin distances away from the nucleus. He observed an atom to back up his thoughts. Walker, Jim. "History of Atoms." History of Atoms. Nobelifs, 1 Nov. 2004. Web. 19 Feb. 2014.

  • Heisenberg and schrodinger

    Heisenberg and schrodinger
    They showed that there is a cloud of electrons around the nucleus. They used experiments and mathmatics to determine that there is a cloud around the nucleus.