CHEM H2A Chapter Notes - Chapter 1: Robert Andrews Millikan, Cathode Ray, South African Class 19C 4-8-2
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Textbook: chemistry structure and properties by nivaldo j. tro. 1. 5 modern atomic theory and the laws that led to it: the law of conservation of mass. In a chemical reaction, matter is neither created nor destroyed: the law of definite proportions. B that combine with 1 g of element a can be expressed as a ratio of small whole numbers. In a chemical reaction, atoms only change the way that they are bound together with other atoms. 1. 6 the discovery of the electron: cathode rays. J. j. thomson performed experiments to probe properties of cathode rays. Particles that compose the cathode ray have these properties: travel in straight lines, independent of composition of the material from which they originate (the cathode, carry a negative electrical charge. Thomson measured the charge-to-mass ratio of the cathode ray particles by deflecting them using electric & magnetic fields (pg.
