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hw2 - Killough Ian Homework 2 Due 4:00 pm Inst Donna C Lyon...

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Killough, Ian – Homework 2 – Due: Sep 14 2006, 4:00 pm – Inst: Donna C Lyon 1 This print-out should have 22 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. The due time is Central time. This HW assignment is due Thursday, September 14, by 4:00 PM. 001 (part 1 of 1) 10 points Which of the following is true about spin pair- ing? 1. It brings about a small attraction between electrons in the same orbital. correct 2. It allows 3 electrons to reside in one atomic orbital. 3. It completely overcomes the electrostatic repulsion between 2 electrons in the same atomic orbital. 4. It contributes nothing to the electronic structure of atoms. Explanation: 002 (part 1 of 1) 10 points Which of the following valence-shell config- urations 4 s 4 p I) ↑↓ II) III) ↑↓ ↑↓ IV) ↑↓ is/are possible for a neutral atom for an ele- ment? 1. I only 2. II only 3. IV only correct 4. More than one of the configurations 5. None of the configurations 6. III only Explanation: The atom with a 4 s 2 4 p 2 valence-shell con- figuration is germanium (Ge). The ground- state configuration is given by ↑↓ The other configurations represent excited states. 003 (part 1 of 1) 10 points What is the ground-state electron configura- tion expected for tungsten? 1. [Xe] 4 f 14 5 d 4 6 s 2 correct 2. [Xe] 4 f 12 5 d 6 6 s 2 3. [Xe] 4 f 8 5 d 10 6 s 2 4. [Xe] 4 f 13 5 d 5 6 s 2 5. [Xe] 4 f 4 5 d 9 6 s 2 6 p 5 6. [Xe] 4 f 4 5 d 10 6 s 2 6 p 4 7. [Xe] 4 f 3 5 d 10 6 s 2 6 p 5 Explanation: 004 (part 1 of 1) 10 points For the ground state atom Ge, what is the type of orbital from which an electron will be removed to form the +1 ion? 1. 6 s 2. 4 f 3. 4 s 4. 4 p correct 5. 2 s 6. 3 p 7. 3 d Explanation:
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Killough, Ian – Homework 2 – Due: Sep 14 2006, 4:00 pm – Inst: Donna C Lyon 2 005 (part 1 of 1) 10 points Which of the following metal ions has the ground-state electron configuration [Ar] 3 d 6 ?
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