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 ztb9/v1- dj:iu1sx hxorder of increasi(6nqtc 4j8 . 1ivhtrgceard84ng radius for these isoelectronic specierrhe8d(cgj6vtt 84i cqn a4.1s?
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).
| 
