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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