exam 1 spring 2007 - Kolar, Leah Exam 1 Due: Feb 7 2007,...

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Kolar, Leah – Exam 1 – Due: Feb 7 2007, noon – Inst: McCord 1 This print-out should have 24 questions. Multiple-choice questions may continue on the next column or page – fnd all choices be±ore answering. The due time is Central time. c = 3 . 00 × 10 8 m/s h = 6 . 626 × 10 - 34 J · s m e = 9 . 11 × 10 - 31 kg R = 3 . 29 × 10 15 s - 1 d water = 1 . 00 g/mL 1lbs = 453 . 6g 1 gal = 3.785 L 1 eV = 1.602 × 10 - 19 J max = 1 5 c 2 ν = R µ 1 n 2 1 - 1 n 2 2 - ¯ h 2 2 m d 2 ψ d x 2 + V ( x ) ψ = ψ n ( x ) = µ 2 L 1 2 sin nπx L · E n = n 2 h 2 8 mL 2 n = 1 , 2 , 3 , ··· E n = - h R n 2 R = m e e 4 8 h 3 ² 2 0 001 (part 1 o± 1) 10 points An electron in a 3 d orbital could have which o± the ±ollowing quantum numbers? 1. n = 3; = 2; m = - 3 2. n = 3; = 0; m = 0 3. n = 3; = 1; m = - 1 4. n = 2; = 3; m = 0 5. n = 3; = 2; m = 0 correct 6. n = 3; = 3; m = 1 7. n = 2; = 2; m = 2 Explanation: 3 re±ers to the principal quantum number n . d corresponds to the subsidiary quantum number = 2. Since = 2, m could be - 2 , - 1 , 0 , 1 or 2. 002 (part 1 o± 1) 10 points As an atom’s radius increases, 1. its ionization energy does not change. 2. its ionizations energy increases or de- creases depending on whether you are going up a column or across a row. 3. its ionization energy increases. 4. its ionization energy decreases. correct Explanation: Ionization energy is the amount o± energy required to remove the most loosely bound electron. As an atom’s radius increases, the outermost electrons are ±arther ±rom the nu- cleus and do not ±eel the pull o± the nuclear charge as strongly. There±ore, they are eas- ier to remove and the ionization energy is decreased. 003 (part 1 o± 1) 10 points The maximum number o± electrons that can be held in one 5 d orbital is 1. 5. 2. 7. 3. 10. 4. 1.
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Kolar, Leah – Exam 1 – Due: Feb 7 2007, noon – Inst: McCord 2 5. 2. correct Explanation: 004 (part 1 of 1) 10 points How many nodal planes and/or nodal cones are expected for 2 s and 4 f orbitals, respec- tively? 1.
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exam 1 spring 2007 - Kolar, Leah Exam 1 Due: Feb 7 2007,...

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