-
340
Aristotle
He thought there were no atoms. He thought that everything was made of air, earth, water, and fire. The method he used was "observation".
http://1.bp.blogspot.com/_z3e2i873CxE/TIPJkgV5OfI/AAAAAAAAACc/t7gHqunTxsY/s400/aristotle_atom_model.gif -
400
Democritus
He claimed that everything is made of atoms. His method was to break things in small pieces. -
Dalton
Discovered atomic theory, established lawof definite porprotions.
His method was to use careful measurements. -
Rutherford
Discovered protons and electrons. He used the "gold foil" method.
http://library.thinkquest.org/27954/Image31.gif -
Thomson
Discoverd the cpmponents of the atom, protons, eletrons, neurtons.
His method was the "plum pudding" model. -
Bhor
Discovered that electrons exist in set orbits around the nucleous.He used Plack's "quantum" theory.
http://images.tutorvista.com/cms/images/81/bohr-model.png -
Heisenberg and Schrodinger
They described the electrons of atoms, and their floting motion.
They used Bohr's model "standing waves".
