E1practice_2010

E1practice_2010 - 1 Exam 1 practice questions: 1. Write the...

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1 Exam 1 practice questions: 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) Sn ___________________________ ___________ (b) Sn 4+ ___________________________ ___________ (c) Er 3+ ___________________________ ___________ (d) V + ___________________________ ___________ (e) Ir ___________________________ ___________ 2. (a) Fill in the blanks in the table below. Mark the angular nodes (if any) on your angular wavefunction and the radial nodes on your radial wavefunction. Explain how you arrived at your orbital choice. Overall wavefunction Radial wavefunction (R(r) n, l ) , mark radial nodes with an x Angular wavefunction (Y l, m ); show angular node(s) 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) Which orbital does the above overall wavefunction correspond to? Give the n and l values and the letter designation for the orbital. 3. On the same coordinate axes below, sketch approximate representations of the radial density distribution function (R(r) 2 r 2 ) for H and He + . Give a brief explanation of the relative positioning of H and He + . R(r) 2 r 2 r
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2 4. Given the common names for the following groups: Groups 3-11 _______________________ Group 2 _______________________ Group 17 _______________________ The 4f series of elements _______________________ rational for your assignment. 5. Shown below is a graph of 2 nd ionization energy versus atomic number for a set of elements that includes the second period elements. (a) Label the second period elements (Li – Ne) on the graph below. Give a brief 0 10 20 30 40
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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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E1practice_2010 - 1 Exam 1 practice questions: 1. Write the...

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