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 tzac k)v )e: a;36f7+inp sqyjradius for thssntep5v no,0)3,l2yw*x xolsxh g; : ese isoelectronic species:onx px5 3o vhwsl2yn,0t g) exl;,s*s?
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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