本题目来源于试卷: Unity and Diversity A.1 Water，类别为 IB生物学
[单选题]
Which of the following statpy4/2buack qh vy+)(fements about the ejt;hz yr w0n+ j;z8q.dipolarity of the water molecule are true8;t. w+0nzr;ehzqjy j ?
I. Oxygen attracts the shared electrons stronger than hydrogen.
II.Hydrogen atoms are partially negative.
III.The shared electrons spend more time closer to oxygen.
A. I and II
B. II and III
C. I and III
D. I, II, and III
参考答案: C
本题详细解析:
Statement I is correctiyp7m7 4t3 :;it-ldv mz)muct. Oxygen has a higher electronegativity compared to hydrogen. 4mp;7 )cmti7mtdv -tyziu:l3 This means that oxygen will attract shared electrons more strongly.
Statement II is false. Since the shared electrons between oxygen and hydrogen spend more time near oxygen, the hydrogen in the water molecule becomes partially positive.
Statement III is true because oxygen attracts the shared electrons more strongly resulting in the shared electrons spending more time closer to the oxygen atom.
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