Chemistry_1031_day4_012809_actual

Chemistry_1031_day4_012809_actual - General Chemistry I...

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General Chemistry I CHE-1031 Dr. Jonathan M. Smith Wednesday, January 28
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Today 2.1 – 2.5 Atomic Theory, Laws, Atomic Structure Re-read Ch. 2 Online exam: Mastering Chemistry
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Recent chemistry related news… January 23, 2009, 3:32 pm E.U. Appeals to U.S. to Join Carbon Market By Andrew C. Revkin
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A omic Theory Chapter 2
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Probing the nature of the atom electron is key to the matter Thomson: measured mass/charge of electron 1906 Nobel Prize in Physics Millikan: Measured mass of e- 1923 Nobel Prize in Physics e - charge = -1.60 x 10 -19 C Thomson’s charge/mass of e - = -1.76 x 10 8 C/g e - mass = 9.10 x 10 -28 g
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6 Radioactivity Henri Becquerel and Marie Curie discovered that certain elements would constantly emit small, energetic particles and rays (late 1800s) These energetic particles could penetrate matter Ernest Rutherford discovered that there were three different kinds of emissions alpha, α , particles with a mass 4x H atom and + charge beta, β , particles with a mass ~1/2000 th H atom and – charge gamma, γ , rays that are energy rays, not particles
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(Uranium compound) 2.2
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2.2 “plum pudding” model of atom
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This note was uploaded on 05/09/2010 for the course CHEM 1031 taught by Professor Thomas during the Spring '06 term at Temple.

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Chemistry_1031_day4_012809_actual - General Chemistry I...

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