20071119_Exam4 Study Questions

20071119_Exam4 Study Questions - CHM 1045 Exam 4 Study...

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CHM 1045 Exam 4 Study Questions Posted November 19th, 2007 Chapter 8 1. a. Give the electron configuration of Fe 2+ and Fe 3+ ion. b. Predict whether Fe 2+ and Fe 3+ ions are paramagnetic or diamagnetic. c. Compare the paramagneticity of the two different ions of Fe. Briefly explain your answer. d. Predict which ion, Fe 2+ or Fe 3+ , is more stable. Briefly explain your answer. e. Compare the stability of the following ion pairs: i) Cu + , Cu 2+ ii) V 2+ , V 3+ Briefly explain your answer in each case. 2. Why the members of the same group have similar chemical properties? 3. a. Why the atomic size increases down the group? b. Why the atomic size decreases across the period from left to right for main group elements? c. Why the atomic size increases for the last two members (Group 1B and 2B) of a transition series/period instead of decreasing? d. Compare the size of the following atoms: i) Li, C, O ii) Li, Mg, Rb iii) Li, P, S, Ca, Sr 4. a. Compare the size of the following pairs and briefly explain your answer: i) Li, Li + ii) Cl, Cl - b. What are the isoelectronic ions? Identify the isoelectronic ions from the following ions: O 2- , Mg 2+ , Br - , Rb + , P 3- , Ca 2+ c. What is the trend in sizes of the ions N 3- , O 2- and F - ? Briefly explain your answer. 5. a. What is ionization energy? b. Consider the following data of ionization energy of Mg: Mg(g) ------- Mg + (g) + e ; IE 1 = 738 kJ/mol Mg + (g) ------- Mg 2+ (g) + e ; IE 2 = 1451 kJ/mol Mg 2+ (g) ------- Mg 3+ (g) + e ; IE 3 = 7733 kJ/mol i) Why the ionization energy increases with successive removal of electrons? ii)
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This note was uploaded on 04/18/2008 for the course CHM 1045 taught by Professor Bush during the Spring '08 term at FSU.

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20071119_Exam4 Study Questions - CHM 1045 Exam 4 Study...

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