A.C B.O C.S D.Cl

作者: tihaiku 人气: - 评论: 0

问题

选项 A.C B.O C.S D.Cl

答案 C

解析已知X、Y、Z是短周期元素，且三种元素原子序数之和为32，根据元素周期表的结构，断定X、Z元素在第二周期，Y则在第三周期，推知X为氮元素，Y为硫元素，Z为氟元素。

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