Midterm Exam 2007-2

Midterm Exam 2007-2 - CHEM 131 – EXAM 1 November 2 2007...

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CHEM 131 – EXAM 1 November 2, 2007 Name: ___________________________________________________________ Please PRINT Discussion Section Number (circle one): Lecture time: 8 am 1121 (Tu, 8 am) 1122 (Tu, 9:30) 1125 (Tu, 12:30) 1141 (Th, 8 am) 1142 (Th, 9:30) 1145 (Th, 12:30) I pledge on my honor that I have not given or received any unauthorized assistance on this examination” S i g n a t u r e D a t e This exam contains six pages in total including this title page: 11 questions on 4 pages (do NOT unstaple these pages and the title page) the Periodic Table of the Elements on 1 page (you may detach it) Check if you have all of that before you begin. You may use any blank pages as a scratch paper. Put your answers ONLY in the space provided. Few examination rules: You may not begin until everyone has an exam If you finish in the last ten minutes, remain in your seat until time is called When time is called, put your pencil down and remain in your desk After all exams have been collected, you will be dismissed Question 1: _____/12 pts Question 7: ____/9 pts Question 2: _____/16 pts Question 8: ____/12 pts Question 3: _____/8 pts Question 9: ____/9 pts Question 4: _____/12 pts Question 10: ____/6 pts Question 5: ____/10 pts Question 11: ____/10 pts (BONUS) Question 6: ____/6 pts TOTAL POINTS : _________/100 + 10 (bonus)
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2 Important Notice: when performing calculations, pay attention to the number of significant figures in your answer! 1. (4 pts each, 12 pts total) a) Draw Lewis dot structures for the following species (the central atom is underlined). Show only one major (“best” or “preferred”) structure even if several major structures are possible. Pay attention to the charge . a) C H 4 b) N O + c) S F 4 b) Circle those structures above where the central atom has an 8-electron configuration (an octet).
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Midterm Exam 2007-2 - CHEM 131 – EXAM 1 November 2 2007...

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