试题与答案

A、B均为短周期元素中的一种,已知A的原子序数为n,A2+离子比B2-离子少8个

题型:选择题

题目:

A、B均为短周期元素中的一种,已知A的原子序数为n,A2离子比B2离子少8个电子,则B的原子序数为

A.n+4             B.n+6            C.n+8              D.n+10

答案:

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