Proposed the concept of the atom
-Matter is composed of empty space through which atoms move.
-Atoms are solid, homogeneous, indestructible, and indiviseble.
-Different kinds of atoms have different sizes and shapes.
-The differing properties of matter are due to the size, shape, and movement of atoms.
-Apparent changes in matter result form changes in the groupings of atoms and not from changes in the atoms themselves.