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First man to believe that the atom was made in a circle, thought of the atom.
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He contributed the Cosmological thesis, which said that everything was made of water; he was also the first philosopher.
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He thought that everyhting was made out of Earth, Fire, Water and Air.
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He discovered gravity, laws of motion, and the light spectrum. He thought Democritus was right about the atom.
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John Dalton Laws
True then false 1.) Matter is made up of atoms that are invisible and indestrituble.
False 2.) All atoms of an element are identical.
True 3.) Atoms of deifferent elements are different.
True 4.) Atoms of different elements combine in simple whole #'s to form compounds.
True 5.) Atoms cannot be created or destroyed. -
He discovered radioactivity. He also performed the Uranium Expirerment.
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He disvocered the electron nad he said the atom cannot be a solid ball. His model was the Plum Pudidng Model. He used the Cathode Ray Tube Experirment.
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He determined the mass and charge of electrons and he performed the Oil Drop Expirement.
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He discovered the nucleus and is credited for the discovery of the proton. He used the Gold Foil Experirment.
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He said that electrons traveled in path and the closer the electron was to the nucleus, the less energy it took to travel and visversa.
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He discovered different isotopes and performed the mass-spectrograph.
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He predicted where the electrons would be at in the atom and he performed the Schrodinger's model.
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He proved the neutrons existense.