chem 141 F07 exam III-Solutions

chem 141 F07 exam III-Solutions - General Chemistry 141...

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General Chemistry 141 Exam II November 7, 2007 Instructions Turn your cell phone OFF . Vibrate is NOT acceptable. The only acceptable setting is OFF . To do otherwise is to compromise the concentration of you and your peers. Show all work for problem- solving questions. If you make any mathematical assumptions, be sure to verify them clearly. Follow correct significant figure conventions. “By signing below, I acknowledge that I have read the instructions above and pledge that I will take this exam under all standards and principles set by the Emory University Honor Council.” SIGNATURE: _______________ KEY ______________________________________ Printed Name: __________________________ Student ID:__________________ Section # __________________ Scantron total ________ Problem total _________ Overall ___________ 1
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I Matching For each of the following questions chose the letter on the right that best matches the question on the left and mark you answer on the bubble sheet . You MUST use a #2 pencil and fill in the sheet properly or your answers will not be recorded and you will receive a zero. (2 points each) 1. _E___ photoelectric effect A. all orbitals with the same n 2. _H____ bomb calorimetry B. q p = Δ H 3. _I____ Pauli principle C. n and l 4. _A____ shell D. all orbitals with the same n 5. _C____ quantum numbers associated with the energy of an electron E. explained by Einstein F. n and m l G. transition elements H. q = Δ E I. no 2 electrons may have all 4 quantum numbers the same K. electrons initially occupy degenerate orbitals singly M. explained by Max Plank N. all orbitals with the same n and l O. energy required to gain one electron II Multiple Choice Chose the most correct answer for each of the following and note the question numbers. Mark you answer on the bubble sheet! (4 points each) 6. Which one of the following statements about atomic structure and quantum numbers is incorrect ? A. In a given atom, the maximum number of electrons having principal quantum number n = 3, is 18. B. The number of orbitals in a given f subshell is 7. C. For n = 4, the largest possible value of l is 3. D. For n = 4, the largest possible value of m l is 2. E. The following set of quantum numbers for a single orbital is not allowed: n = 3, l = 1, m l = -2. 2
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7. Select the arrangement of electromagnetic radiation which starts with the lowest energy and increases to greatest energy. A. Radio, visible, infrared, ultraviolet B. Microwave, infrared, visible, ultraviolet C. Visible, ultraviolet, infrared, gamma rays D. X-radiation, visible, infrared, microwave E. None of the above is in the correct order 8. An atom of element number 33 (As) is in its ground electronic state. Which one of the following sets of quantum numbers could not apply to any of its electrons? a.
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chem 141 F07 exam III-Solutions - General Chemistry 141...

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