# HW-3 - Rahman Tarique – Homework 3 – Due midnight –...

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Unformatted text preview: Rahman, Tarique – 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. 2 . 9818 × 10- 40 m 2. 1 . 4725 × 10- 30 m 3. 2 . 9818 × 10- 37 m 4. 1 . 47244 × 10- 27 m correct Explanation: m = 0 . 00045 g × . 001 kg 1 g = 4 . 5 × 10- 7 kg λ = 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; ‘ = 2; m ‘ =- 3 4. n = 2; ‘ = 2; m ‘ = 6 5. n = 3; ‘ = 1; m ‘ = 2 6. n = 3; ‘ = 0; m ‘ = 0 7. n = 3; ‘ = 2; m ‘ = 0 correct 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. 4 2. 10 3. 6 4. 5. 34 6. 16 correct 7. 12 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 6 f ? 1. None of these 2. 6 correct 3. 2 4. 4 5. 5 6. 3 Explanation: Rahman, Tarique – Homework 3 – Due: Sep 18 2007, midnight – Inst: Vandenbout 2 n = 6 005 (part 2 of 3) 10 points What is the orbital angular momentum quan- tum number for the orbital 6 f ? 1. 2 2. 4 3. None of these 4. 3 correct 5....
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HW-3 - Rahman Tarique – Homework 3 – Due midnight –...

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