ψ 2 stands for h mv 9. Answer the following questions concerning the 5d orbitals.

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1 hem 121 Spring 2014 Practice Test Questions for Exam IV has been updated Page 1 Remember the handout with a list of suggested problems from hap. 9 & 10 that has answers in the textbook. Also, Wiley has ungraded 121 Review #05 and #06 for these two chapters. D NT ASK ME FR ANSWERS T MULTIPLE IE QUESTINS. YU SULD E ALE T FIGURE IT UT YURSELF FRM REVIEWING LETURES AND TEXTK N TE TPI. 1. Without doing any calculations, determine which transition would produce a wave of longer wavelength: Sketch an energy diagram to show how you reached your conclusion. a) n = 4 n=3 or n = 4 n=2? Ans. n=4 3 b) n = 6 5 or n = 3 2? Ans. n = Which of the following transition is expected to produce the highest frequency? (No calculations necessary)a. n = 8 n = 7. n = 8 n = 1. n = 4 n = 1 D. n = 3 n = 2 Ans. () 3. List the 3 major differences between ohr s and Schroedinger s models of the atom. 4. a) Fill in the electrons in the energy diagram below for the ground state Ti atom. E 4d 1s 2p 2s 3d 3p 3s 4p 4s b) Give the full electron configuration for Ti consistent with your diagram above. c) ircle the valence electrons both in the diagram and in the electron configuration you gave in (b). 5. Sketch the shape of the p y orbital, and of the two different shapes of the d orbitals. 6. Ground state S has the electron configuration of (based on the E diagram above) 7. According to de roglie's equation which of the following statement is correct? A. Large objects have very small wavelengths.. Large objects have very large wavelengths. 8. In Schroedinger's equation, what does these symbols stand for? ψ stands for ψ 2 stands for 9. Answer the following questions concerning the 5d orbitals. a) l = b) values of m s that are allowed = c) values of m l that are allowed = 10. ow many orbitals in n = 4 has the angular momentum quantum number equal to 1? 11. Which of the following orbital is not allowed? A. 5f. 4d. 1p D. All of the above are allowed. E. None of the above are allowed. λ h mv

2 hem 121 Spring 2014 Practice Test Questions for Exam IV has been updated Page Which of the following set of quantum numbers is not allowed? n l m l m s A) ½ ) ½ ) ½ D) ½ 13. Using the periodic table, give FULL electron configuration of the bromide ion. 14. Give the electron configuration of r using the RE method. 15. Give the electron configuration of only the valence electrons of Te (atomic number 52). 16. Give the formulas of 2 ions that are isoelectronic to Xe. Ans. and 17. Give the e-configuration of Mn 2+ using the core method. 18. Give the e-configuration of u using the core method. 19. Sketch the shape of the p y orbital, and of the two different shapes of the d orbitals. 20. Ground state S is A. paramagnetic. diamagnetic 21. Ground state u is. A. paramagnetic. diamagnetic 22. Ground state r is. A. paramagnetic. diamagnetic 23. Which has the most innershell shielding of the nuclear charge? A. Se. r. Te D. l 24. Which is the largest atom? A. P. As. S D. Se 25. Which has the highest ionization energy? A. P. As. S D. Se 26. Which has the larger atomic radius? A. Li. Li Which has the largest atomic radius? A. l. K +. Ar D. All have the same radius. 28. ur current periodic table the elements are in order of A. increasing stability.. increasing number of neutrons.. increasing atomic number. D. increasing atomic mass. 29. Which has the larger lattice energy? A. Kr. MgS 31. Which has the larger lattice energy? A. MgS. as 32. Which has the higher electronegativity? A. S. As 33. Which has the higher electronegativity? A.. Na 34. Draw the Lewis structure of 3 molecules of water showing the correct bond angles and also showing how they would orient themselves around the ion shown below: Na Draw 3 molecules of water and show what is broken when water boils. 36. Give the Lewis structures, including resonance structures and formal charges if any: + a) Mgl 2 b) Nl 3 c) N 4 d) l e) r For each of the following bonds, draw in the and + and to show the polarity. If it is not polar say so. P S l F Se l 38. Give the Lewis structure of ln where is the central atom (l is chlorine, not and I). Remember to work out the formal charges of each atom. Is the molecule polar? Explain. 39. Fill in the blanks for each of the following: (Assume is more electronegative than A.)

3 hem 121 Spring 2014 Practice Test Questions for Exam IV has been updated Page 3 A A A A molec. geometry: hybridization of A bond angles: Polar or nonpolar? 40. Give all the resonance structures of S 2 (including formal charges, if any) and then indicate which is the most stable. 41. a) Give the Lewis structure of Xer 2, including formal charges if any. # of pairs of valence electrons = b) What is its geometry? Ans. Ans x2 = 11 pairs c) What is its bond angle? Ans. d) What is the hybridization of Xe? Ans. : r Xe r : 42. The nitrate ion has the resonance structures shown below. (b) linear (c) 108 (d) sp 3 d a) Fill in any formal charges that may be missing. : : : N : : : : N : : : : N : b) Give its resonance hybrid. c) State its geometry:. State its bond angle:. State the hybridization of N: State its bond order: d) Is it polar? ircle one: Yes or No e) Do all the resonance structures a resonance hybrid have the same geometry? ircle one: Y or N Ans. (c) trigonal planar, 120, sp 2 at N, bond order between N and each = 1 1/3 (d) nonpolar (e) yes 43. Examine the structure on the right. ow many and how many bonds are there? What is the bond angle at each? What is the bond angle for? Fill in the missing lone pairs for this molecule : Molecular formula = # valence electrons = 3x4 + 1x4 + 6x2 = =14 pairs 44. enzene is often depicted as shown on the right: What is the molecular formula of benzene? int: Draw out the full structure of benzene showing all the ANSWERS. 8 sigma bonds, 2 pi bonds ond angle at 1 = 120 ond angle at 2 = 120 ond angle at 3 = 120 ond angle of = What is the bond order between any of the two carbon atoms? ow does the bond strength of in benzene compare with that of a = double bond? ow does the bond length of in benzene compare with that of a = double bond? What is the bond angle of in benzene?

4 hem 121 Spring 2014 Practice Test Questions for Exam IV has been updated Page Give the definition of isomers. 46. Give the definition of resonance structures. 47. Are the following structures depicting isomers or resonance structures? Explain how you tell which is which. + N: N :

5 hem 121 Spring 2014 Practice Test Questions for Exam IV has been updated Page Fill in the electrons in the M diagram for 2. According to the diagram, a) Is the 2 molecule paramagnetic or diamagnetic? b) What is the bond order of 2? c) What do the asterisks mean? Additional questions may be added after Thursday s lecture.