hw 3 answers - Iype, Shelby Homework 3 Due: Sep 18 2007,...

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Unformatted text preview: Iype, Shelby Homework 3 Due: Sep 18 2007, midnight Inst: Vandenbout 1 This print-out should have 25 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. The due time is Central time. This homework is the second of two home- works from Chapter 12 in your textbook. 001 (part 1 of 1) 10 points What is the de Broglie wavelength of a flea midway through its jump? Assume the mass of the flea is 4 . 50 10- 4 g and it is moving at 1.00 m/s. 1. 1 . 4725 10- 30 m 2. 2 . 9818 10- 37 m 3. 1 . 47244 10- 27 m correct 4. 2 . 9818 10- 40 m Explanation: m = 0 . 00045 g . 001 kg 1 g = 4 . 5 10- 7 kg = h p = h m v = 6 . 626 10- 34 kg m 2 s (4 . 5 10- 7 kg)(1 m / s) = 1 . 47244 10- 27 m 002 (part 1 of 1) 10 points An electron in a 3 d orbital could have which of the following quantum numbers? 1. n = 3; = 3; m = 1 2. n = 3; = 1; m =- 1 3. n = 3; = 1; m = 2 4. n = 3; = 2; m =- 3 5. n = 3; = 2; m = 0 correct 6. n = 2; = 2; m = 6 7. n = 3; = 0; m = 0 Explanation: 3 refers to the principal quantum number n . d corresponds to the subsidiary quantum number = 2. Since = 2, m could be- 2 ,- 1 , , 1 or 2. 003 (part 1 of 1) 10 points How many p electrons does Se (atomic num- ber 34) possess? 1. 2. 12 3. 34 4. 10 5. 16 correct 6. 4 7. 6 Explanation: Se has 6 electrons in the 2 p and 3 p orbitals plus 4 more in the 4 p orbital. This gives it a total of 16 p electrons. 004 (part 1 of 3) 10 points What is the principal quantum number for the orbital 3 d ? 1. 2 2. None of these 3. 6 4. 4 5. 5 6. 3 correct Explanation: Iype, Shelby Homework 3 Due: Sep 18 2007, midnight Inst: Vandenbout 2 n = 3 005 (part 2 of 3) 10 points What is the orbital angular momentum quan- tum number for the orbital 3 d ? 1. 2 correct 2. 1 3. 3 4. None of these 5. 4 6....
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This note was uploaded on 03/30/2009 for the course CH 301 taught by Professor Fakhreddine/lyon during the Spring '07 term at University of Texas at Austin.

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hw 3 answers - Iype, Shelby Homework 3 Due: Sep 18 2007,...

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