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Hypothesiezed that atoms combine in definite proportions. He proceeded to calculate the atomic weights from the percentage composition of compounds.
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He introduced the concept of an electron in 1874 and recognized it as the amount of electricity produced during the electrolysis of compounds. The word electron came about a few years later in 1891.
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Studied and Discovered Canal rays. His work and studies also proposed the presence of protons.
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Investigated the rays from cathode rays with magnets, his findings showed that cathode rays were composed of an unknown negatively charge particle(electrons).
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Invented Cathode ray tube, which aided in the inventention of the T.V.
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Proposed the different energy levels of electrons in an atom and that each level orbited the nucleus in a stable and organized manner.
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Nagaoka developed the planetary model of electrons orbiting the nucleus.
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Proposed the Rule of 8; normal valence plus contravalence adds up to 8, also known as abeggs rule.
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Known for her pioneering research of Radioactivity and her discovery of the mystery element of radium.
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His biggest success is the determining the charge of an electron and it's consistancy through all atoms.
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Suggested the idea of neutron based on his gold foil experiment. Conducted gold foil experiment, which suggested most of the atoms mass is found in a nucleus with the rest of the atom being empty space.
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Known for his observations of the spontaneous decay of elements, calling them isotopes
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He wrote that the atomic numberis the number of protons in the nucleus. This helped make a more acurate periodic table.
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Related the behavior of matter and behavior of atoms by using quantum mechanics.
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Discovered the neutron and studied it, which later lead to the discovery and creation of the nuclear bomb during the Manhattan project.
