本题目来源于试卷: Molecules and Solids，类别为 IB物理学
[问答题]
Describe how the molef n+rr5 hq2*ffculjwu8tzxl5 h3y,c b.j+e $ \text{CaCl}_2 $ could be formed.
参考答案: Ca has 2 s electrons in the outer shell and each Cl is only missing 1 electron from its outer shell. These three atoms share their electrons in such a way as to have filled outer shells. Look at (Fig. Below a) and (Fig. Below b); each of the 2 outer electrons of Ca will fit into the “extra electron” position of the 2 Cl atoms, forming strong ionic bonds.  a  b
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