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Final.Form B.YellowVersion.Answers.2008

Final.Form B.YellowVersion.Answers.2008 - Chem 1B Final...

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1 Chem. 1B Final FORM B First letter of your last name: March 20, 2008 Name: Last Name First Name Perm # INSTRUCTIONS: No hats allowed. No sharing of calculators. Cell Phones, iPods, headsets, etc. must be turned off and put away. SCANTRON FORM: Use a PENCIL 1) Write your name 2) Bubble in FORM B 3) Bubble in your PERM number (7 digits only, no extra numbers) INFORMATION PAGE: An information page is provided separately. No other notes or books are allowed. There are 8 pages, 32 questions. Each question is worth 5 points. SHOW ALL YOUR WORK on the exam. Turn in the Scantron form and your Exam . 1. Which of the following atoms or ions has 2 unpaired electrons? a) N b) Ni ANSWERS are given on the last page c) S 2– d) Zn e) Al 2. Which of the following electronic configurations correspond to an excited state? I. 1s 2 2s 2 2p 1 II. 1s 2 2s 2 3p 4 III. 1s 2 2s 2 2p 4 3s 2 IV. [Ar]4s 2 3d 4 4p 3 3. Identify the atom with the electron configuration [Ar]4s 2 3d 4 4p 3 . a) As b) Co c) Ni d) Cu e) Fe
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2 4. What is the maximum number of electrons in an atom that can have the quantum numbers n = 3, m l = +1. 5. Which of the following atoms has the smallest radius? 6. Which of the following elements is the most electronegative? a) Se b) P c) B d) N e) C 7. Which of the following bonds is the most polar? 8. The successive ionization energies for an unknown element are shown below. IE 1 = 580 kJ/mol IE 2 = 1815 kJ/mol IE 3 = 2740 kJ/mol IE 4 = 11,600 kJ/mol To which family in the periodic table does the unknown element most likely belong? 9. What is the oxidation state of Be in Be 2 O 3 2– ?
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