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400
Democritus 400BC
He stated all matter is made up of atoms. He also stated atoms are eternal and invisible and so small that they can't be divided, and they can entirely fill up the space they're in. http://prezi.com/3c5y42qph552/atomic-theory/ -
400
Aristotle 400BC
He based his theory about matter on the four elements of Earth. He believed that all substances were made of fire, water, and air. He believed that it could be divided forvever. His method was memory.
http://prezi.com/6fkcwpdzacl1/atomic-theory-timeline/ -
Dalton
Dalton formed the atomic theory, (all matter is composed of tiny, indestructable, particles, that are alike and have the same atomic weight. He used the microscope method to make hid discovery.
http://prezi.com/iyxtvvbp-jj-/development-of-the-atomic-theory/ -
Thomson 1897
He discovered that if negative electrons (particles) were to mix throughout the atom, it would make them able to split even further. He used the cathode ray and different experiments. prezi.com/cyxztk5h1g6p/atomic-theory-timeline -
Rutherford
Rutherford usedresults of his gold foil experiment to state all mass of an atom were in a small positively charged ball at the center of an atom. To discover this he used alpha particles and the Gold Foil Experiment.
prezi.com/cyxztk5h1g6p/atomic-theory-timeline -
Bohr
He stated electrons moved around the nucleus in successfully large orbits. Bohr presented the atomic model. In 1913 he passed onto a study of the basics of Rutherfords discovery of the atomic nucleus.
http://prezi.com/iyxtvvbp-jj-/development-of-the-atomic-theory/ -
Heisenberg and Schrodinger
Schrodinger introduced the Schodinger Equation- a wave equation the describes the form of the probability waves that govern the motion of small particles and how these waves are altered by external infleunces. Heisenberg calculated the behavior of electrons and suatomic particles that also make up an atom. The uncertainty Principle. They both built on the thoughts of Bohr. prezi.com/xlgsaa0rn1df/atomic-theory
