本题目来源于试卷: Models of Bonding & Structure B.2 The Covalent Model，类别为 IB化学
[单选题]
The bond angles surrounding atoms 1, 2, and 3 are:
A. Atom 1 is $90^{\circ}$;Atom 2 is $120^{\circ}$;Atom 3 is $120^{\circ}$
B. Atom 1 is $109.5^{\circ}$;Atom 2 is $120^{\circ}$;Atom 3 is $109.5^{\circ}$
C. Atom 1 is $107^{\circ}$;Atom 2 is $120^{\circ}$;Atom 3 is $109.5^{\circ}$
D. Atom 1 is $109.5^{\circ}$;Atom 2 is $120^{\circ}$;Atom 3 is $107^{\circ}$
参考答案: D
本题详细解析:
Atom 1 has four electron domains and so a tetrahedral shape ($109.5^{\circ}$)
Atom 2 has three electron domains and so a trigonal planar shape $120^{\circ}$
Atom 3 has four electron domains of which one is a lone pair giving it a trigonal pyramidal shape ($107^{\circ}$)
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