对于IVA族元素,下列叙述中不正确的是A.SiO2和CO2中,Si和O,C和O之

对于IVA族元素,下列叙述中不正确的是

A.SiO2和CO2中,Si和O,C和O之间都是共价键

B.C、Si和Ge的最外层电子数都是4,次外层电子数都是8

C.CO2 和 SiO2 都是酸性氧化物,在一定条件下都能和氧化钙反应

D.该族元素的主要化合价式-4和+2

 

答案

B

解析:

 

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