Democritus

Democritus' Atomic Model Democritus' atomic theory stated that the atom was the absolute smallest piece of matter, they are indivisible and indestructable, and they move about in space, combining in various ways to form everything in existence. He elaborated on his teacher, Leucippus', theory of the atom, and applied it to the natural world. Today's Scientists know that Democritus was incorrect in saying that atoms were indestructable and indivisible, because we are now able to split atoms. Scientists also know that his idea that atoms differ in shape is incorrect, because all atoms are spherical. However, atoms are known to differ in size.