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100
Democritus (400 B.C.)
He called the smalles pieces atomos which means uncuttable.
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http://the-history-of-the-atom.wikispaces.com/file/view/demo__atom_model.gif/183311563/demo__atom_model.gif -
100
Aristotle
He said atoms didn't exist. He said that matter was made up of the elememts such as: earth, water, air, and fire.
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http://www.chemistryland.com/CHM130S/03-BuildingBlocks/Chaos/Aristotles5thElement.jpg -
Dalton
He said that atoms were tiny,indivisible,indructible particles and each particle has a mass, size,and chemical behavior.
http://the-history-of-the-atom.wikispaces.com/file/view/demo__atom_model.gif/183311563/demo__atom_model.gif
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Thomson
Thomson discovered electrons. He said that if you were to break open an atom, then you would see electrons scattered around the interior like raisins in plum pudding. His atomic model was called the Plum Pudding Model.
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http://images.tutorvista.com/content/atoms-and-nuclei/plum-pudding-model.jpeg -
Rutherford
he said an atom has a nucleus. Positive charged center in the atom.
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http://upload.wikimedia.org/wikipedia/commons/thumb/e/e8/Rutherford_atomic_planetary_model.svg/220px-Rutherford_atomic_planetary_model.svg.png -
Bohr
Bohr discovered the nuleus of the atom. He said that electrons are like planets orbiting the sun.
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http://science.jrank.org/article_images/ep201102/science/science982.jpg -
Heisenberg and Schrodinger
