23 - Topics for the day Administrative stuff Exam Two...

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Unformatted text preview: Topics for the day Administrative stuff Exam Two results Molecular bonding theories Spectroscopy New topic: Gases, liquids, solids Exam Two grades available now on Quest Answer key available on Quest after class for any grade disputes, send email to me with your exam version #, question #, and reason for dispute. Homework ALEKS Objective 3 - you have until next Monday ALEKS Objective 4 - due two weeks from Monday (3/29) Prep ALEKS - also due 3/29 No Quest HW at the moment Administrative stuff Exam One CH301: Exam 1 10 20 30 40 50 60 10 20 30 40 50 60 70 80 90 % score Number of students C Class Average 80% CH301: Exam 2 5 10 15 20 25 30 35 40 45 10 20 30 40 50 60 70 80 90 % score Number of students C Exam Two Average excludes students not taking the exam Class Average 74% 1 2 3 This pie chart is for current grades. It includes ALEKS prep, ALEKS and Quest homework, clickers, and drops the worst two HW and the worst exam. Grades will be updated on BB over spring break. F 10% D 6% C 16% B 29% A 39% 40% of the questions were correct for 80% of the class. Here are the questions that caused the most problems. Lets see how many of you went and Fgured out the right answers after the test... An atom has 35 protons and 35 electrons. Select the true statement A. The atom will have a large favorable electron afFnity B. The atom will have a low ionization energy C. The atom is isoelectronic with Se + D. The atom is isoelectronic with Kr E. The atom possesses no d electrons . The atoms size will be larger than the size of Ca iClicker Time GRADED protons = electrons neutral Z=35 is Bromine Se + = 33 electrons Kr = 37 electrons [Ar] 4s 2 3d 10 4p 5 Br is same row as Ca, to the right smaller ar right on the periodic table higher ionization energy 4 5 6 Which of the following molecules is nonpolar? A. H 2 O B. NF 3 C. CH 3 Br D. SO 2 E. BF 3 iClicker Time GRADED H Br H H C F F F B H H O F F F N O O S O O S Rank the following salts from from least to greatest lattice energy: LiF, LiBr, BeF 2 , BeBr 2 A. LiF < LiBr < BeF 2 < BeBr 2 B. BeBr 2 < BeF 2 < LiBr < LiF C. LiF < BeF...
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23 - Topics for the day Administrative stuff Exam Two...

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