#Chem 161-2004 Exam III + answers

#Chem 161-2004 Exam III + answers - Chemistry 161 Exam III...

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Chemistry 161 Exam III December 1, 2004 Student Name: _____TAVSS________________ Recitation Section Number: ____ Recitation Instructor: _____TAVSS____________________ The exam has 25 questions for credit and an additional one to check the color of your exam booklet. Please answer all 26 questions on the OpScan sheet. There is no penalty for guessing. At the end of the 80-minute exam period, please hand in only this top sheet and your OpScan form. If you finish early, please do not disturb your fellow students. A proctor will check your picture-ID, OpScan form and signature during the exam. Exam scores and an exam curve will be posted as soon as possible. ON THE OpScan FORM: (Use a Number 2 Pencil or Darker) SEC. PER. INST. SEC. PER. NST SIGN your name across the TOP of the form. 01 M3 HS 32 M6 BL 02 M5 BL 33 W6 HS (2) code only the following information [ blacken circles] 03 M5 DS 35 M8 BL 04 W3 ME 36 M8 JJ (a) Your Name . . . LAST NAME FIRST 05 W5 DS [ blank space between last and first names ] 06 W5 HS INITIAL KEY: 07 F3 NM (b) Your SOCIAL SECURITY NUMBER 08 F5 NM HS = H. Sangari [Start under Box A and continue to Box I ] 09 F5 ME 18 M1 FS (c) Your RECITATION SECTION NUMBER (Boxes K & L ) 19 M1 RA FS = F. Serefiddin [Sections 01 – 09, code the zero under Box K ] 20 M3 FS 21 M3 RA NM = N. Marky (d) Your EXAM FORM NUMBER (Box P ) 22 W1 ET 23 W1 FS BL = B. Langowski 24 W3 ET 25 H1 FS JJ = J. Jefferis 26 H1 RA 27 H3 ME DS = D. Siegel 28 H3 RA 29 H3 ET ET = E. Tavss 30 M6 JJ 31 M6 HS ME = M. Esguerra Your EXAM FORM is: RA = R. Agarwal See last page of exam for periodic table and atomic weights. 161 EXAM III V 1 F ALL 2004 1
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1. Chem 161-2004 Hourly exam III Chapter 7B - Atomic Structure and Periodicity Polyelectronic atoms (Aufbau principle) Which of the following atoms has the ground state electronic configuration with the most unpaired electrons? A. Cl B. P C . Cr D. Co E. Ni Aufbau: 17 Cl = [Ne]3s 2 3p 5 ↑↓ ↑↓ One unpaired electron ↑↓ 15 P = [Ne]3s 2 3p 3 Three unpaired electrons ↑↓ 24 Cr = [Ar]4s 2 3d 4 → [Ar]4s 1 3d 5 Six unpaired electrons 27 Co = [Ar]4s 2 3d 7 ↑↓ ↑↓ Three unpaired electrons ↑↓ 28 Ni = [Ar]4s 2 3d 8 ↑↓ ↑↓ ↑↓ Two unpaired electrons ↑↓ 2. Chem 161-2004 Hourly exam III Chapter 7B - Atomic Structure and Periodicity Periodic table and periodic table trends Which of the following metals is the best reducing agent in the gas phase? A. Ca B. K C. Li D . Rb E. Mg The best reducing agent is in the lower left corner of the periodic table. Hence, Rb should be the best reducing agent. This can also be figured out with the effective nuclear charge diagrams. 161 EXAM III V 1 F ALL 2004 2
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161 EXAM III V 1 F ALL 2004 3 20 Ca 20+ 2+ 12+ 2+ 37+ 1+ 3+ 1+ 19+ 1+ 12 Mg 37 Rb 3 Li 19 K X X X X X X X X X X X X X X X X X X X X X X X X X X X X X
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This test prep was uploaded on 04/12/2008 for the course CHEM 161 taught by Professor Vacillian during the Fall '08 term at Rutgers.

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#Chem 161-2004 Exam III + answers - Chemistry 161 Exam III...

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