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Proposed law of conservation of mass-Lavoisier
The mass of a isolated system will remain constant overtime. -
proposed law of definie proportions-Proust
It was denied by many scientist at the time but in todays world it is a very easy process scientist use. -
Thought matter was continous-aristotle
Thoughts became scientific method used today. -
Proposed atomic theory-Dalton
If two elements came together form more than one compound, then the ratios of the masses of the second element which combine with a fixed mass of the first element will make the ratio smaller -
Thought matter was invisible "atomos -Dalton
indistructible andcan change shapes and sizes. bounce off eah other often forming clusters with different arrangments. -
Discovered naturally occuring radioactivity-Becquerel
Dicscovered that tis can cause bad things to happen to people if they are around it alot. -
cathode ray tube experiment-Thompson
Did four Experiments on the magnetic deflection of cathode rays, Experiment to show that cathode rays were electrically charged, Experiment to show that cathode rays could be deflected electrically, and Experiment to measure the mass to charge ratio of cathode rays. All later influenced scientist. -
Discovered the electron-Thompson
Discovered that electron can transfer energy and is now used as a component of a molecule. -
Discovered two element p and ra-currie
polonium can be used to heat spaceships, but it is unstable as all isotopes and radioactive. Radium is found in uranium ore. Important because we use these elements today. -
plum pudding model-Thompson
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Discovered electrons mass and charge-millikan
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Electron cloud model-rutherford
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Rutherfords nuclear atom-rutherford
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oil drop experiment-Millkan
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Gold foil experiment-Rutherford
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discovered nucleus-rutherford
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organized periodic table by atomic number-Moseley
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planetary or solar system model of the atom-Bohr
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discovered the proton-rutherford
