Story about the discovery of the atom

    The discovery of the atom was a very slow development.
    Democritus was the first to say that matter is composed of atoms, and that they were indivisible.
    Dalton later, in 1803 launched his atomic theory of matter. It said that all known matter is made up of atoms, and these were the smallest that could divide the matter is, they were indivisible.


I leave the link of a video so you can see the discovery of the atom and have developed different theories to the course of history.

http://www.youtube.com/watch?v=zX3jsE_ZYi4