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Blank Chem Prelim 1

Blank Chem Prelim 1 - Name(Last(First Cornell Student ID...

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1 Name________________________________ ( Last ) ( First ) Cornell Student ID Number________________________________ Lab Instructor’s Name________________________________ Lab Section (Day and Time)________________________________ Chemistry 207 Preliminary Examination 1 October 5, 2006 Time: 7:30 PM – 9:00 PM Please do not open the exam until told to do so. You have 1.5 hours to complete the exam. This exam has 9 pages, none of them blank. Page 9 shows a periodic table and various constants and equations. Before beginning work, check to make sure your exam is complete. Write directly on these pages. Show all of your work and indicate units where necessary . You may turn in the exam at the front of the room when finished. 1. (20) ______ 2. (30) ______ 3. (30) ______ 4. (30) ______ 5. (35) ______ 6. (30) ______ TOTAL (175) _________
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2 1. Briefly state the single most important fact or principle that was established by each of the following experiments. Each answer must be less than 20 words. [5pts] (a) Analysis of the wavelengths of light emitted by solids at various temperatures [5pts] (b) Rutherford's irradiation of metal foil with alpha particles [5pts] (c) Thomson's measurements of cathode rays [5pts] (d) Millikan's measurements with oil drops
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