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Unformatted text preview: Kim, Eugene – Homework 3 – Due: Sep 18 2007, midnight – Inst: McCord 1 This printout should have 25 questions. Multiplechoice 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 . 47244 × 10 27 m correct 2. 2 . 9818 × 10 40 m 3. 2 . 9818 × 10 37 m 4. 1 . 4725 × 10 30 m 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; ‘ = 1; m ‘ = 2 2. n = 3; ‘ = 3; m ‘ = 1 3. n = 3; ‘ = 0; m ‘ = 0 4. n = 3; ‘ = 2; m ‘ = 3 5. n = 3; ‘ = 2; m ‘ = 0 correct 6. n = 2; ‘ = 2; m ‘ = 6 7. n = 3; ‘ = 1; m ‘ = 1 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. 12 2. 16 correct 3. 34 4. 5. 4 6. 6 7. 10 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 5 p ? 1. 4 2. 2 3. None of these 4. 5 correct 5. 3 6. 6 Explanation: Kim, Eugene – Homework 3 – Due: Sep 18 2007, midnight – Inst: McCord 2 n = 5 005 (part 2 of 3) 10 points What is the orbital angular momentum quan tum number for the orbital 5 p ? 1. 2 2. 1 correct 3. 3 4. 5. None of these 6. 4 Explanation: ‘ = 1 006 (part 3 of 3) 10 points How many magnetic quantum numbers does the orbital 5 p have?...
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 Fall '07
 Fakhreddine/Lyon
 Chemistry, Atom, Ionization Energy, Atomic orbital

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