HW2answers pg7 - The 3 d sublevel has enhanced stability...

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6. 3 d correct Explanation: 026 (part 1 of 1) 10 points Identify the set(s) of four quantum numbers n l m l m s A. 2 , 2 , - 1 , + 1 2 B. 5 , 4 , +5 , + 1 2 C. 6 , 0 , 0 , + 1 2 that are FORBIDDEN for an electron in an atom 1. A and B only correct 2. C only 3. B and C only 4. B only 5. None is invalid. 6. A only 7. A and C only 8. All are invalid. Explanation: A) The maximum value l can have is n - 1; since n = 2, l max = 1 . B) For l = 4 , m l can only be an integer from - 3 to +3; i.e. , m L can only equal 0, ± 1, ± 2, or ± 3. 027 (part 1 of 1) 10 points Depict the electron con±guration for silicon using rare gas (shorthand) notation. 1. 1 s 2 2 s 2 2 p 6 3 s 2 3 p 2 2. [Ne] 3 s 2 3 p 4 3. [Ne] 3 p 2 4. [Ne] 3 s 2 3 p 2 correct Explanation: 028 (part 1 of 1) 10 points The electron con±guration for the ground state of an isolated Fe atom is 1. 1 s 2 2 s 2 2 p 6 3 s 2 3 p 6 4 s 2 3 d 6 . correct 2. 1 s 2 2 s 2 2 p 6 2 d 10 3 s 2 3 p 6 . 3. 1 s 2 2 s 2 2 p 6 3 s 2 3 p 6 4 s 2 4 p 6 . 4. 1 s 2 2 s 2 2 p 6 3 s 2 3 p 6 3 d 8 . Explanation: 029 (part 1 of 1) 10 points
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Unformatted text preview: The 3 d sublevel has enhanced stability when it contains 1. 5 electrons. 2. 5 or 10 electrons and no 4 s electrons. 3. no 4 s electrons. 4. 5 or 10 electrons. correct 5. 5 or 10 orbitals. Explanation: 030 (part 1 of 1) 10 points What is the electronic con±guration of yt-trium (symbol Y)? 1. 1 s 2 2 s 2 2 p 6 3 s 2 3 p 6 3 d 10 4 s 2 4 p 6 5 s 3 2. 1 s 2 2 s 2 2 p 6 3 s 2 3 p 6 3 d 10 4 s 2 4 p 6 4 d 3 3. 1 s 2 2 s 2 2 p 6 3 s 2 3 p 6 4 s 2 4 p 6 3 d 10 3 f 3 4. 1 s 2 2 s 2 2 p 6 3 s 2 3 p 6 4 s 2 3 d 10 4 p 6 5 s 2 4 d 1 correct 5. 1 s 2 2 s 2 2 p 6 3 s 2 3 p 6 3 d 10 4 s 2 4 p 6 5 s 2 5 p 1 Explanation:...
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This note was uploaded on 01/23/2011 for the course CH 301 taught by Professor Fakhreddine/lyon during the Spring '07 term at University of Texas.

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