Friday, September 17, 2010

This Week In Chem....(Lame Title Right?)

So this week in Chemistry was a bit of a refresher course in the history of the atom. I know, you're jealous right? Actually I remember that at some point in Intro to Chem I had learned all of key points (Rutherford's Model, Cathode Ray Tubes, Plum Pudding Model, etc...) but promptly forgot it all after the chapter test. The most important points that we cover this week include, the progression of models of the atom (Democritus, Dalton's Atomic Theory, Thomson's Plum Pudding Model, Rutherford's Atomic Model, and Chadwick's revised Atomic Model with the neutron. We also learned how they discovered the sub-atomic particles (Cathode Ray+ Magnet (Electron), the Gold Foil experiments (Protons), Chadwick's discovery (Neutron). The last bit of learning that went on this week involved Atomic Number (# of protons or electrons in an element, what makes and element that element) and Atomic Mass (# of Protons+ # of Neutrons, usually both #'s are equal unless it is an isotope(Element with extra neutrons)). So this all basically sums up the week in Chem, minus the completely off topic discussions that came up during homework time on thursday. I should've probably been doing more homework and less talking but, hey it all worked out...

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