chem1A-fa09-mt4-Stacy-exam - Chemistry 1A, Fall 2009...

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Chemistry 1A, Fall 2009 Midterm Exam #4 December 3, 2009 (90 min, closed book) Name:__________________________________ SID:___________________________________ GSI Name:________________ The test consists of 25 multiple choice questions. Circle the BEST answer and bubble the choice on your scantron form. Question Page Points Score Multiple Choice 2-6 80 Total 80 Useful Equations and constants: E = h  = c E kin (e-) = h binding energy ܣ ൌߝ݈ܿ 1 eV = 1.6021×10 -19 J 1 J = 1 kg·m 2 /s 2 h = 6.63×10 -34 J·s c = 3.0×10 8 m/s N A = 6.02 x 10 23 particles/mol
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Name_____________________GSI__________ Page 2 of 6 Consider the following elements: Ca, Fe, Ga, and Se 1. The electron configuration for Fe is A) [Ar] 3d 6 4s 2 B) [Ar] 4s 2 3d 5 C) [Ar] 3d 8 2. How many nodes does the 3d orbital have? A) 2 B) 3 C) 4 3. Choose the best explanation for why the ionization energy of Ga is LESS than the ionization energy of Ca. A) The ionization energy decreases across a row due to increasing effective nuclear charge. B) The ionization energy increases across a row due to increasing effective nuclear charge. C) The effective nuclear charge for Ga is smaller because there are more electrons in the n=3 shell. 4. For which element is the total energy required to remove 3 electrons the greatest? A) Fe B) Ca C) Ga 5. How many electrons are in the n=3 level in Se? A) 6 B) 8 C) 18 6. Which quantum numbers describe the outermost electron in Ga? A) shell=4 subshell = p orientation=p z spin = +½ B) shell=3 subshell = d orientation=d xy spin = ½ C) shell=3 subshell = p orientation=p x spin = +½
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Name_____________________GSI__________ Page 3 of 6 A fellow Chem 1A student takes a trip to an art museum and decides to review the concepts of light and color. What follows are his thoughts about what he is observing. Circle the sentence that is correct. 7. As I walk in the door, I notice that the museum lights are very dim. There is also a sign that says: “No flash photography in the museum.” I’ve heard that bright light makes the paint fade.
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This note was uploaded on 09/24/2010 for the course CHEM 22345 taught by Professor Stacy during the Spring '10 term at University of California, Berkeley.

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chem1A-fa09-mt4-Stacy-exam - Chemistry 1A, Fall 2009...

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