Exam 1 - Chemistry 201X: Hour Exam I September 15, 2006...

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Chemistry 201X: Hour Exam I September 15, 2006 Name: ___KEY_____________________________ GRADING Page 1 25 points _________________ Page 2 25 points _________________ Page 3 25 points _________________ Page 4 25 points _________________ TOTAL 100 points _________________ Rules for the Exam: (1) Show all work for the problems (pages 2-4). No credit will be given, even if an answer is written, if no work is shown. (2) Work independently. (3) You may tear off the last page and use it for information and additional scrap paper. Regrading Policy: We make every effort to grade exams thoroughly and accurately. However, when you receive your graded exam and you feel that there are grading errors in your exam, then the following rules apply: (1) You may return the exam for regrading only by the end of the class period in which it is returned to you. Once you leave the classroom with your exam, we will no longer accept it. (2) Write your concern(s) legibly and thoroughly on the front page of the test booklet – indicate clearly what you want to be re-evaluated. (3) We reserve the right to re-evaluate the entire exam when submitted.
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1 PART I. (25 Points) Short Answer Questions (Circle your choices or fill in blanks) (a) (3 pts) Precision is a measure of how closely a given measurement agrees with (a) the true quantity of the property being measured; (b) another measurement of the property. (b) (3 pts) One significant result of Milliken’s oil drop experiment was (a) the charge-to-mass ratio of the electron; (b) the mass of the electron; (c) the nuclear structure of the atom (c) (3 pts) In electron microscopes , the incident electrons used to produce an image have energies on the order of (a) microvolts (b) millivolts (c) volts (d) kilovolts (d) (3 pts) An atomic force microscope is useful for examining the surfaces of (a) metals only (b) liquids only (c) all solids (d) insulators only (e) (4 pts) Which one of the following samples contains more atoms ?
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Exam 1 - Chemistry 201X: Hour Exam I September 15, 2006...

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