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选择题：在NaCl、MgCl2、AlCl3、SiCl4四种物质中，离子极化作用最强的是（ ） A、NaCl B、MgCl2C、AlCl3 D、SiCl4 答案：D 提示：能阐述出解题过程的给予额外奖励，答案回复可见
D 三周期元素的氯化物NaCl、MgCl2、AlCl3、SiCl4、PCl5为例，从Na+到P5+电荷递增，离子半径递减，故正离子的极化力越来越强
D、SiCl4 半径依次减小，电荷越高，半径越小，离子极化作用越强。
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