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14 Cards in this Set
- Front
- Back
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Democritus
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-Greek
-Called basic particle atom |
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Dalton
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1) Law of Definite Proportion/ Composition
2) Law of Multiple Porportions 3) Law of Partial Pressure Atom- solid sphere |
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JJ Thomson
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-CRT
-Plum pudding model -Discovered Electrons |
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Rutherford
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-Alpha Particles (+ charge)
-Alpha Scatter/ Gold Foil Experiment Atom- not solid, small + dense center (nucleus), negative charges outside nucleus |
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Moseley
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-Ordered atoms based on # of protons
-Used radioactive material to count protons -Fixed Meneleev's table |
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Bohr
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-Planetary Model
-Electrons in orbit |
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Mendeleev
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-Did not experiment
-Ordered Periodic Table based on atomic weight -Predicted: eka-aluminum (Gallium) eka-silicon (Germanium) Scandium |
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Geiger
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-"Geiger Counter"
-Measured the amount of radiation |
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Roentgen
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Unit of measurement for radiation
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Goldstein
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-Discovered Proton
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Chadwick
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-Discovered Neutron
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Millikan
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-Oil Drop Experiment
-Charge of Electron was equal to but opposite of proton -found mass of electron |
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Marie Curie
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Discovered Radiation
Uranium Polonium Thorium Radium |
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Becquerel
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-Discovered Isotopes
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