Ch4 - Exam 1: Friday, February 1, 2008 Exam Format Q &...

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Exam Format Q & A Exam 1 has 28 multiple choice questions. Exam 1 covers lecture material presented concerning  chapters 1-3 and HW# 1-5 (and the HW#1 bonus). The cover sheet is same cover sheet as on the posted practice Exam 1. Your best study strategy is to review the homeworks and then test your knowledge with the practice exam(s). Make sure you can recall information quickly.  You only have 50 minutes (1.8 minutes/question). Exam 1:  Friday, February 1, 2008
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Exam Room Policies 1) Your exam cannot leave the room with you. 2) Take care of biological functions before the exam. 3) All papers and notes must be put away before the exam is distributed. 4) Scrap paper and notes are not allowed. 5) Please be ready to show ID when you turn in your exam. 6) If you complete the exam before class ends, you may go. 7) You must turn in the exam when class ends, even if you are not finished.  What to Bring: Pencil/pen Calculator (with memory  cleared) Student ID/driver’s license
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When will my score get back to me? I should be able to return the exams on Wednesday. Here ends the material you are responsible for for Exam 1
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Metals Non- metals Electron configurations of   anions   and   cations Section 4.1 A nonmetal _________________electron(s) to become a(n) ______________________ which is isoelectronic with its nearest noble gas. GAINS ANION Hi EN Lo EN Goal:  Gain or lose e-s to get a Noble Gas Core A metal _________________electron(s) to become a(n) ______________________ which is isoelectronic with its nearest noble gas. LOSES CATION grabbers givers
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Predicting charges of  anions  and  cations Section 4.1 The charge on the cation = # e s lost. The charge on the cation = group #. Al is group 3   Al The charge on the anion = # e - s gained. The charge on the anion = group # - 8. S is group 6   S 2- What is the expected charge on a Rb cation? What is the expected charge on a P anion?
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Electron Configuration of Cations Valence e-s in highest n quantum number are lost first. When valence e-s have the same n, the e-s in the  highest  l quantum number are lost first. Section 4.2 Any engineer knows  the e-s  are NOT removed in the reverse order they came in.  Remove  valence p, then s, then d.
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Na Ca Zr In [Ne] 3s 1 [Ar] 4s 2 Element e- config Cation e- config [Kr] 5s 2 4d 2 Mn [Ar] 4s 2 3d 5 [Kr] 5s 2 4d 10 5p 1 Electron Configuration of Cations   [Ar] [Kr] 5s 2 4d 10 5p 1 Section 4.2 [Ne]
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Cl Se N [Ne] 3s 2 3p 5 [Ar] 4s 2 3d 10 4p 4 Element e- config Anion e- config [He] 2s 2 2p 3 F [He] 2s 2 2p 5 Electron Configuration of Anions Cl Section 4.2 [Ne] 3s 3p [Ar]  or Se [Ar] 4s 3d 4p or [Kr]  N [He] 2s 2p or [Ne]  F [He] 2s 2p or [Ne]  The new e-s go in the lowest energy orbital that is available.
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Things that Make you go HMMM [Ne] N [Ne]  [Ne] O [Ne]  F [Ne]  Ion e- config Ion Section 4.2
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This note was uploaded on 03/29/2008 for the course CH 101 taught by Professor Bigham during the Fall '08 term at N.C. State.

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Ch4 - Exam 1: Friday, February 1, 2008 Exam Format Q &...

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