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Exam I Blank - 1 Chem 251 - Introductory Inorganic...

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1 Chem 251 - Introductory Inorganic Chemistry Exam 1 - Wednesday, February 17, 2010 Name (PRINT LEGIBLY): __________________________________________________ Pledge: I have neither given nor received aid on this examination. Signature: _____________________________________________________ INSTRUCTIONS: Do not start until you are instructed to do so. If you are asked to give an explanation in a question, please be brief. Concise, precise answers receive more credit than imprecise long-winded answers. Practice good test-taking skills. If you get stuck on a problem, move on. There is an information sheet and a scratch sheet appended to the exam. Please use the scratch sheet to keep your exam paper covered. When time is call, STOP . It is a violation of the honor code to not do so. Grading: Page 2 ___________ Page 3 ___________ Page 4 ___________ Page 5 ___________ Page 6 ___________ TOTAL __________
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2 1. Write the ground state electron configuration for each of the following species. Use the noble gas core symbol to abbreviate the inner core of electrons and give the electron configuration beyond the noble gas core. Assume the normal filling rules are obeyed . Electron Configuration number of unpaired electrons (a) In ___________________________ ___________ (b) In 3+ ___________________________ ___________ (c) Ce 3+ ___________________________ ___________ (d) V +2 ___________________________ ___________ (e) Re ___________________________ ___________ 2. (a) Fill in the blanks in the table below. Explain how you arrived at your orbital choice. Overall wavefunction Radial density function (R 2 (r) n, l ) , mark radial nodes with an x on your plot Angular wavefunction (Y l, m ); use shading to indicate nodes in your picture R(r) r (b) How many radial nodes does the plot of the overall wavefunction show? ___________ (c) How many angular nodes does the plot of the overall wavefunction show? ___________ (d) Give the n and l values and the letter designation for the overall wavefunction orbital.________ 3. Shown below are plots of the radial density distribution functions vs. r (pm) for three different orbitals. On the line below the plot, make an assignment of the orbital from the selection 2s, 3s, 3d, 3p. Explain briefly.
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This note was uploaded on 03/14/2011 for the course CHEM 251 taught by Professor Schauer during the Spring '08 term at UNC.

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Exam I Blank - 1 Chem 251 - Introductory Inorganic...

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