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John Dalton begins research in the atomic field and makes an atom model of a small solid sphere.
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Sir William Crookes uses a cathode ray tube and finds out theroies about electrodes.
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Thomson added negative electrons to Daltons model. He envisioned a positively charged orb with little negatively charged particles in it.
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Mr. Rutherfield discovered a nucleus within the atom. He made a conclusion about positively charged particles called protons within the nucleus.
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Bohr discovered that the elctrons might move in specific orbits around the nucleus,
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Sir James discovered the subatomic particle called the neutron. It is located within the nucleus.
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The electron cloud theory was proposed