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  Set a mechanical universe with small solid masses in motion
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  "atomic theory" with spherical solid atoms based upon measurable properties of mass
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  constructed a cathode ray tube , which later became the basis for television
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  discovered that certain chemicals glowed when exposed to cathode rays
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  discovered the electron
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  creates special and general theories of relativity, and hypothesizes about the particle natural light.
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  developed the theory for the structure of the atom
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  Developed the Bohr atomic model
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  discovers the neutron component of the atomic nucleus
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  discovered nuclear fission