本题目来源于试卷: Classification of Matter A.1 Periodic Table Elements Classification，类别为 IB化学
[单选题]
Which gives the correct order of increasing radiu.0 wxyiyud1lqp.q x, /s for these isoelectronic spe-d4v+ex/ nphi) eh2 vmacg3:tcinvxh 4m-vac23p /eh :de+t )gies?
A. $S^{2−}$ < $Cl^−$ < $Ar$ < $K+$
B. $K+$ <$Ar$ < $Cl^−$ < $S^{2−}$
C. $Ar$ < $Cl^−$< $K+$ < $S^{2−}$
D. $S^{2−}$ <$K+$ < $Ar$ < $Cl^−$
参考答案: B
本题详细解析:
Explanation: The number of shells and therefore the shielding effect is the same for all of these species. As the number of protons decreases, the attraction between the nucleus and electrons decreases, resulting in a smaller radius. $K^+$ has the most protons (19), whereas $S^{2−}$ has the least (16).
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