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"By convention bitter, by convention sweet, but reality atoms in a void"
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discovered the law of Conservation of mass, states that for any system closed to all transfers of matter and energy
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all matter is made of atoms, atoms are invisible
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properties of elements “ were periodic functions of their atomic weights”, This became known as the Periodic Law
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Used CRT to experimentally determine the charge to mass ration (e/m) of an electron, Studied “canal rays” and found they were associated with the proton H+
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a model of the atom that incorporated the recently discovered electron
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Oil drop experiment determined the charge and the mass of an electron
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relatively high central charge concentrated into a very small volume in comparison to the rest of the atom and with this central volume also containing the bulk of atomic mass.
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is an informal term in physics, it is used to describe were electons are when the go around the nucleus of an atom
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– Using alpha particles as atomic bullets, probed the atoms in a piece of thin gold foil. He established that the nucleus was: very dense,very small and posit
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the model depicts the atoms as a small, positively charged nucleus by electrons that travel in circular orbits around the nucleus
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measured an alpha particle beam is scattered when it strike metal foil.
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Using x-rat tubes, determined the charges on the nuclei of most atoms, he wrote “The atomic number of an element is equal to the number of protons in the nucleus”. This work was used to reorganize the periodic table based upon atomic number instead of atomic mass
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Developed an explanation of atomic structure that underlies regularities of the of the periodic table. His atomic model had atoms built up of successive orbital shells of electrons
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Using alpha particles discovered a neutral atomic particle with a mass close to a proton. Thus was discovered the neutron
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A vaccum tube containing one or more electron guns, and a fluorescent screen used to view images