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Matter is made of small indivisible particles which have different form, position, and arrangement.
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The universe is a mechanical universe with small solid masses in constant motion.
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Spherical atoms have measureable properties of mass
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Proposed that electricity was made of discrete negative particles, called electrons.
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Discovered the electron and used cathode ray tubes to determine the charge to mass ratio of an electron to be 1.759 x 108 coulombs/ gram. He also found canal rays were associated with a proton.
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Used quanta, discrete units of energy to explain glowing hot matter.
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There are flat rings of electrons revolving around a positively charged particle.
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Determined the charge and the mass of an electron to be 1.602 x 10-19 C and 9.11 x 10-28 g respectively.
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Determined that the nucleus is a small, dense, positively charged part of the atom.
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Stated that the atomic number is equal to the number of protons in the nucleus.
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Created a model of successful orbital electron shells.
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Discovered the neutron by using alpha particles.
