Problem Set 5

Problem Set 5 - Name Section Rec TA Side 1 of 3 Ch 1a,...

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Name Ch 1a, Problem Set Five Section Side 1 of 3 Due Friday, Oct. 28, 2005 Rec TA at 4 PM in the Drop Box Problems 2 and 4 are designated ( ) as ‘no collaboration’ problems. 1. (15 Points) You have just completed an experiment where you measured the first ionization energies of consecutive elements. Unfortunately, as you are perusing your results over lunch, you smear lutefisk, a Norwegian delicacy of fish soaked in lye underground for two weeks, on your notebook, rendering half of the page illegible. Rather than redo the experiment, which took you the better part of a day, you decide to apply your Ch1a knowledge to reconstruct the data. You remember that the first entry has the lowest atomic number of the list. As the list goes up alphabetically, the atomic numbers increase consecutively, so that the last entry has the highest atomic number. What is element L on this list? Explain your reasoning. 2. (15 Points) Out of each pair, which ion has the smaller radius? No credit will be given unless you explain each inequality in terms of screening or electronic configurations. a. (5 Pts) Cs + , Sr 2+ b. (5 Pts) (5 Pts) Sr 2+ , Nb 2+ ( Note : V loses its 4s electrons before its 3d electron ) c. (5 Pts) Br - , Kr 3. (15 Points) Out of each pair, which neutral element has the lower ionization energy? Explain each answer with screening and/or electronic configurations for full credit.
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Problem Set 5 - Name Section Rec TA Side 1 of 3 Ch 1a,...

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