CHEM101 Lecture Notes - Lecture 1: Electric Discharge, Robert Andrews Millikan, Antoine Lavoisier

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12 Oct 2016
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CHEM101 Full Course Notes
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Law of conservations of mass: mass is neither created nor destroyed. (lavoisier) Law of definite proportions: a given compound always contain the same proportions of elements by mass. (proust) by atoms { ccl4 and c and 4 cl"s} Law of multiple proportions: two elements can form more than one compound. For given compounds the ratio of element can be reduced to small whole numbers. A given compound always has the same relative numbers and types of atoms: reactions involve reorganization of the atoms change of the way they bound together. J. j. thomson (1897) electrical discharge in cathode tube. He was able to get the mass to charge ratio of electon. Me/q and its only about -ve charged particles ( electrons: millikan (1909) Influencing the droplet (suspend it) we can get the values of the mass and the charge. Positive charge must be balance to counter balance the electrons: that positive charge is diffused through out thats atom.

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