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【段考】國三自然下學期
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107年 - 2018高雄市市立林園高中附設國中九年級107 下學期自然第一次段考(期中考)翰林#84969
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1. Which element has the highest electron affinity? (A)oxygen (B)nitrogen (C)fluorine (D)chlorine
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2. Predict which of the following sets of ions would have the greatest coulombic attraction in a solid compound: (A)Na+, F- (B)Na+, Cl- (C)Na+, Br- (D)Na+, I-
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3. Identify the following species as Lewis acids: (A)NH3 (B)BF3 (C)CN- (D)F-
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4. On the basis of configuration for the neutral molecule O2, write the molecular orbital configuration of the valence molecular orbital for, give the expected bond order. (A)0.5 (B)1.0 (C)1.5 (D)2.0 (E)2.5
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5. Rank the following molecules, ions and radicals in order of increasing H-C-H bond angles: CH3+; CH3-; CH2; CH22+. (A)CH22+>CH3+>CH2>CH3- (B)CH3->CH2>CH3+>CH22+ (C)CH2>CH3+>CH3->CH22+ (D)CH3+>CH22+CH2>CH3- (E)CH3+=CH22+=CH2=CH3-
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