2010 Exam 1 - Chemistry 241 Spring 2010 Exam 1 Name TA 1 2...

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Chemistry 241 Spring 2010 Exam 1 Name __________________________________ TA __________________________________ Section __________________ 1. You are responsible for all information on this page. 2. Show all work on the exam, and write answers in ink. Clearly indicate your answer and mark through any writing that should be ignored in grading. 3. There are five questions and one bonus question. You should also have a Periodic Table. Potentially Helpful Information E = -(13.6 Z 2 )/(n) 2 Energies of a hydrogen-like atom in eV E = h ν = hc/ λ A hydrogenic orbital has n – 1 total nodes of which l are non-radial nodes. c = 2.998 x 10 8 m s -1 h = 6.626 x 10 -34 J s mass e - = 9.1094 x 10 -31 kg 1 J molecule -1 = 6.242 x 10 18 eV molecule -1 Slater’s Rules Z eff = Z - Σσ i σ i = 1.00 for e - in (n–2) shell or lower σ i = 0.85 for e - in (n–1) shell σ i = 0.35 for e - in same (ns,np) shell σ i = 0.00 for e - in (n+1) shell
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Problem 1. _________/16 Problem 2. _________/18 Problem 3. _________/16 Problem 4. _________/16 Problem 5. _________/14 Bonus _________/2 Total _________/80
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X Y Z X Y Z 1. (16 points.) Orbitals of the hydrogen atom. A. The 2p(y) orbital of the hydrogen atom has one angular node. Sketch a contour of the
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