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Joseph-Louis Proust conclude that every chemical compound contains fixed and constant proportions of its constituent elements.
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Fires electrons at a screen of phosphors (not phosphorous) to produce an image.
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Discovered the electron. Proposed the plum pudding model of the atom, as a positively charged body scattered with the negatively charged electrons.
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J.J. Thomson proposed his atomic theory that atoms were a positively charged fluid scattered with negatively charged electrons.
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Experimented with droplets of oil to discover the exact charge of an electron.
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Fired alpha particles at a piece of gold foil, some of which bounced back, disproving Thomson's idea of the plum pudding model.
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Proposed by Niels Bohr, this model suggests that the atom has a superdense nucleus of protons and neutrons, orbited by electrons in a regular motion.
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Won a Nobel Prize for making many important contributions to the field of Quantum Mechanics.
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Publishes the results of her experiments on radioactive substances, discovering nuclear fission and proving that nuclei aren't static.
