In order to predict the shape of a molecule, you should follow these steps:
(1) Draw the Lewis structure of that molecule.
(2) Apply the valence shell electron pair repulsion (VSEPR) theory.
The Lewis structure of SO2 is different from those of F2O and Cl2O. In SO2 the central atom (S) has one lone pair, one single bond and one double bond. In X2O (X = halogen), oxygen has two lone pairs and two single bonds. According to the VSEPR theory, the O-S-O bond angle in SO2 should be close to 120 degrees. In X2O, the X-O-X bond angle is expected to be a little bit smaller than 109.5 degrees.
thay đổi nội dung bởi: LessThanPerfect, ngày 01-06-2008 lúc 02:31 AM.
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