CHEM 1110 Lecture Notes - Lecture 1: International System Of Units, Kilogram, Oil Drop Experiment
14 Sep 2016
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Joule ( j = kg * m^2 / s^2) Empedocles was the first to categorize material and must into a simpler smaller form. Democritus particles, he was the 1st to think of the atom. Law of conservation of mass: matter cannot be created nor destroyed. In a given compound the number and kind of atoms are always consistent. Ratios are the same no matter the different mass numbers. Cathode rays are independent of the electrode material. Measured the charge to mass ration of electrons for the 1st time: 1. 76 x 10^8 c/g. Plum pudding model of the atoms there was no nucleus in his model he just thought protons and electrons were all just floating around. Millikan oil drop experiment charge of an electron = 1. 602 x 10^-9 c electron mass 9. 1 x 10^-28 g. Rutherford gold foil experiment: a (alpha partilces) directed through a thin gold foil, a particles bounced off of something, but not all.
