Plato created another theory based on the idea that explained that all things were made of 4 elements, which were earth, wind, fire, water and univers. He related this concepts with tetrahedron, octahedron, icosahedron, cube, and dodecahedron.
Approx. 450 BC
Democritus created a theory, which was based on the idea of atoms, the smallest indivisible, invisibles and eternal thing that formed all tangible things.
John continued the theory of atoms, but adding and re-making things. The theory was based on these facts:
-The matter is made of atoms.
-Every chemical element has the same atoms but different from anothers.
-Every compound is made of the unity from different elements, always the same type and proportion
Ernest Rutherford said that particles were made of protons, electrons and neutrons, and they had positive and negative charges.
Joseph John Thompson
Thompson created a new atom model, the "cookie model", based on a ball with many balls inlaid.
Niels Bohr added that there was a nucleos, in which orbits electrons.