key_e2_f06 - CHE 131 Exam 2 Fall 2006 Multiple Choice 4...

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CHE 131 Exam 2, Fall 2006 Multiple Choice , 4 points each Identify the letter of the choice that best completes the statement or answers the question. 1. Which of the following is the molecular orbital electron configuration for O 2 2– ? A. ( σ ls ) 2 ( σ ls *) 2 ( σ 2s ) 2 ( σ 2s *) 2 ( π 2p ) 6 B. ( σ ls ) 2 ( σ ls *) 2 ( σ 2s ) 2 ( σ 2s *) 2 ( π 2p ) 4 ( σ 2p ) 2 C. ( σ ls ) 2 ( σ ls *) 2 ( σ 2s ) 2 ( σ 2s *) 2 ( σ 2p ) 2 ( π 2p ) 6 D. ( σ ls ) 2 ( σ ls *) 2 ( σ 2s ) 2 ( σ 2s *) 2 ( σ 2p ) 2 ( π 2p ) 6 ( π 2p *) 2 E. ( σ ls ) 2 ( σ ls *) 2 ( σ 2s ) 2 ( σ 2s *) 2 ( σ 2p ) 2 ( π 2p ) 4 ( π 2p *) 4 2. The bond lengths of the diatomic molecules Cl 2 , HCl, and HI are, respectively, 200, 127, and 161 pm. What is the radius of an iodine atom? A. 100 pm B. 80.5 pm C. 144 pm D. 134 pm E. None of the above. 3. Which, if any, of the following periodic properties are ordered incorrectly ? A. radii: Ne < Al < Na B. radii: Al 3+ < Na + < Ne C. ionization energy: Na < Al < Ne D. ionization energy: Ne < Na + < Al 3+ E. All of the above are ordered correctly. 4. How many sigma and pi bonds are in the following molecule? A. 5 σ and 3 π B. 5 σ and 4 π C. 9 σ and 3 π D. 9 σ and 4 π E. 9 σ and 2 π and 1 δ
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5. In a hydrogen atom, which transition will produce the longest emitted wavelength of light? A. n = 4 to n = 3
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This note was uploaded on 04/20/2008 for the course CHE 131 taught by Professor Kerber during the Spring '08 term at SUNY Stony Brook.

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key_e2_f06 - CHE 131 Exam 2 Fall 2006 Multiple Choice 4...

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