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| Ancient philosophers believed that the Earth was made out of four elements...? |
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| Believed matter was made out of empty space and atoms. Proposed first atomic theory |
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| Believed in the four elements, made Democritus's views forgotten |
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Law of Conversion of Mass
Father of Modern Chemistry |
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| Mass cannot be created nor destroyed |
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Solid Sphere Model
Law of Definite Proportion
law of Multiple Proportion |
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Proposed by Dalton
All matter is composed by identical atoms, diff from other elements |
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Plum Pudding Model
Cathode Ray Tubes
FOUND ELECTRON, positive particle |
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Nuclear Model
Gold foil Experiment
Found the nucleus |
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studied quantum stuff
PLANCK'S CONSTANT |
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| Done by Ernest Rutherford |
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| Stuff about wave like properties |
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| Most modern model of atom, Quantum Mechanical Model |
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| Law of Definite Proportions |
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| Specific substances always contain elements in the same ratio by mass |
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| Law of multiple Proportions |
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| different compounds can be made from the same elements and the ratio of one element to another element must always be in whole numbers |
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