Optional_Ch._8_Key - Ionic character is proportional to the...

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Ionic character is proportional to the difference in electronegativity values between the two elements forming the bond. Using the trend in electronegativity, the order will be: Br-Br < N-O < C-F < Ca-O < K-F least most ionic character Note that Br-Br, and C-F bonds are all covalent bonds since the elements are all nonmetals. The Ca-O and K-F bonds are ionic as is generally the case when a metal forms a bond with a nonmetal. a. Al* and CP AlCl- ------- eA~&+~~um~-- - c. SP and P; SrF,, strontium fluoride d. Ca2+ and P3-; Ca,PZ, calcium phosphide 40. a LZ; Li+ is smaller than Cs+. b. NaBq Br smaller than I-. e. GO; 02- has a greater charge than F. f. Li,O; The ions are smaller in Li,O. H H 0 I I II I BaO; a greater charge C1-. d. CaSO,; Ca2+ a Na+. 50. H -C-0--H + -0 -----+ H -C-C-0--H I H I H Bonds broken: Bonds formed: - 1 C = 0 (1072 kJIm01) 1 - C (347 kJ/mol) 1 - 0 (358 1 = 0 (745 1 C - 0 kJImol) -- ------------- 62. a. POCI, has 5 + 6 + 3(7) = 32 valence electrons. . . I 0 :o: I .. I CI - P-CI : - P-q[ : . :L1: . . Skeletal structure Lewis structure This structure uses all 32 e- while satisfying the octet rule for all atoms. a valid Lewis structure.
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This note was uploaded on 03/29/2011 for the course CHEMISTRY Chem150 taught by Professor A during the Winter '06 term at North Shore Community College.

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Optional_Ch._8_Key - Ionic character is proportional to the...

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