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Chapter 8 Review Packet 3-25-09 Reform]

A hbr b hi c hcl d hf e h 2 20 electronegativity from

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a. HBr b. HI c. HCl d. HF e. H 2 20. Electronegativity __________ from left to right within a period and __________ from top to bottom within a group. a. decreases, increases b. increases, increases c. increases, decreases d. stays the same, increases e. increases, stays the same 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? a. BeF, MgF, NF, OF b. OF, NF, BeF, MgF c. OF, BeF, MgF, NF d. NF, BeF, MgF, OF e. MgF, BeF, NF, OF 23. The ion ICl 4 - has _____ valence electrons. a. 34 b. 35 c. 36 d. 28 e. 8 24. The Lewis structure of SO 3 is _____. a. d. b. e. c.
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The formal charge on nitrogen in NO 3 - is _____. a. -1 b. 0 c. +1 d. +2 e. -2 26. In the resonance form of ozone shown below, the formal charge on the central oxygen atom is _____. a. 0 b. +1 c. -1 d. +2 e. -2 27. In the nitrite ion (NO 2 - ), _____. a. both bonds are single bonds b. both bonds are double bonds c. one bond is a double bond and the other is a single bond d. both bonds are the same, each being stronger and shorter than a single bond but longer and weaker than a double bond e. there are 20 valence electrons 28. Resonance structures differ by ____________. a. number and placement of electrons b. number of electrons only c. placement of atoms only d. number of atoms only e. placement of electrons only 29. How many different resonance structures can be drawn for the molecule SO 3 ? a.
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a HBr b HI c HCl d HF e H 2 20 Electronegativity from left...

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