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Chapter 8 Review Packet 3-25-09 Reform]

In the molecule below which atom has the largest

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17. In the molecule below, which atom has the largest partial negative charge? Cl F—C—Br I a. Cl b. F c. Br d. I e. C 18. Given the electronegativities below, which covalent single bond is most polar? Element: H C N O Electronegativity: 2.1 2.5 3.0 3.5 19. Of the molecules below, the bond in _____ is the most polar. 20. Electronegativity __________ from left to right within a period and __________ from top to bottom within a group. 21. A nonpolar bond will form between two __________ atoms of __________ electronegativity. a. different, opposite b. identical, different c. different, different d. similar, different e. identical, equal
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22. Which of the following has the bonds correctly arranged in order of increasing polarity? 23. The ion ICl 4 - has _____ valence electrons. 24. The Lewis structure of SO 3 is _____.
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25. The formal charge on nitrogen in NO 3 - is _____. a. -1 b. 0 c. +1 d. +2 e. -2
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