Online Assignment 4

# Online Assignment 4 - Maple T.A. - On-line Assgt. 4 (Module...

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Maple T.A. - On-line Assgt. 4 (Module 4) CHEM 212 DE, Fall 2008 : On-line Assgt. 4 (Module 4) Welcome Steve Lee-chem212-F08 http://mapleta-mef.math.uwaterloo.ca:8081/mapleta/modules/gradeProctoredTest.Login (1 of 6) [04/12/2008 10:27:48 PM] View Details Help View Grade Quit & Save Feedback: Details Report [PRINT] CHEM 212 DE, Fall 2008 , On-line Assgt. 4 (Module 4) Steve Lee-chem212-F08, 12/4/08 at 11:59 AM Question 1: Score 1/1 Your answer: Your response Consider simple cubic (sc) packing, body-centred cubic (bcc) packing and face-centred cubic (fcc) packing arrangements of identical hard spheres, each having radius R. How many spheres are there per unit cell in the sc lattice? 1 (Enter an integer.) In terms of density, which packing arrangement gives the solid that is least dense? sc (Enter one of: sc, bcc, or fcc.) Which packing arrangement gives the unit cell with the smallest edge length? sc (Enter one of: sc, bcc, or fcc.) What is the coordination number of a sphere in the sc lattice? 6 (Enter an integer.) For the sc lattice, what is the value of a/R, where a is the edge length? 2.0 (Enter a number accurate to 1 decimal place, e.g. 1.0) Question 2: Score 1/1

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Maple T.A. - On-line Assgt. 4 (Module 4) Which of the following physical properties are characteristic of ionic solids? (You may select more than one answer.) Choice Selected soft No [answer withheld] high volatility No [answer withheld] usually good conductor of electricity in the liquid phase Yes [answer withheld] brittle Yes [answer withheld] usually a good conductor of electricity in the solid phase No [answer withheld] low volatility Yes [answer withheld]
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## This note was uploaded on 07/31/2011 for the course CHEM 212 taught by Professor Not sure during the Spring '09 term at Waterloo.

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Online Assignment 4 - Maple T.A. - On-line Assgt. 4 (Module...

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