ICPChapter7

ICPChapter7 - nucleus pulls them closer and the ion size...

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Chapter 7 In Class Problems 1. Arrange atoms in order of increasing atomic radius F, P, S, As F, S, P, As 2. Arrange the atoms in order of increasing first ionization energy He ,Li ,Be ,F ,Ne Li ,Be ,F ,Ne ,He 3. Arrange the atoms in order of increasing second ionization energy C ,Ar ,K ,Ca Ca, C , Ar, K 4. What is the electron configuration of S 2 ? 1 s 2 2 s 2 2 p 6 3 s 2 3 p 6 isoelectronic with Ar 5. Which of these species is isoelectronic with C? N ,O 2 ,B ,H These ions are isoelectronic (have the same number of electrons as) with C: B , O 2 6. Which atoms has the largest electron affinity? Which has the smallest electron affinity? Li ,F ,Ne Fhasthehighest,Nethelowest 7. Rank the ions in order of increasing atomic radius PP P 2 P 3 Na Na Na 2 Na 3 S 2 Cl Ar K P P P 2 P 3 As electrons are added they repel each other and the ion size increases. Na
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Unformatted text preview: nucleus pulls them closer and the ion size shrinks. K Ar Cl S 2 These ions are isoelectronic with each other. (They all have the same number of electrons.) S 2 has the smallest nucleus and K the largest nucleus. So K will be the smallest and S 2 the largest. A larger nucleus will pull the electrons closer making the atom smaller. 8. Which of these orbitals experiences the largest screening effects? 1 s , 2 s , 2 p , 4 f 4 f 9. Which electron has a larger Z eff a. A 1 s electron in H or a 1 s electron in Li? Li because the nucleus in Li is larger. b. A 2 p electron or a 3 p electron of S? 2 p . The 3 p electron is further from the nucleus on average and will experience more screening effects. 10. Which of these elements has the most metallic character? Li, Na, Rb, Mn, Cu Rb...
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This note was uploaded on 11/21/2011 for the course CHEM CHEM 1201 taught by Professor Rupnik during the Spring '11 term at LSU.

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ICPChapter7 - nucleus pulls them closer and the ion size...

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