(7分)指出下列元素在周期表中的位置:①Ne:    周期      

(7分)指出下列元素在周期表中的位置:

①Ne:    周期       族;        ②C:     周期        族;

微粒中的质子数是_______,中子数是_______,核外电子数是_______。

 

答案

(7分)  2  ,O        2   , IVA     16  ,  18  ,  18

解析:

 

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