Which of the following discoveries came first?, Discovery of the nucleus, Discovery of the neutron, Discovery of the electron, None of the above, Who proposed that electrons orbit the nucleus in specific energy levels or shells?, Niels Bohr, Democritus, Ernest Rutherford, James Chadwick, Who first proposed that matter is made of tiny, indivisible particles called 'atomos'?, Democritus, Aristotle, Plato, Ernest Rutherford, Which scientist’s atomic theory was the first based on experimental evidence?, James Watson, James Chadwick, Ernest Rutherford, John Dalton, J.J. Thomson’s experiment using cathode rays led to the discovery of what subatomic particle?, Proton, Neutron, Electron, Carbon
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Atomic Theory
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Chemistry
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