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 is in the correctdea1r d y0,)w. hd;aux 4-xfj3*eh 4dojm ip:eorder from smallest to largest radius?
A. $Ca^{2+}$, $Na^+$,$ Ne$, $O^{2−}$
B. $O^{2−}$, $Ne$, $Ca^{2+}$, $Na^+$
C. $Ne$, $Na^+$, $O^{2−}$, $Ca^{2+}$
D. $Na^{+}$, $Ne$, $O^{2−}$, $Ca^{2+}$
参考答案: D
本题详细解析:
Explanation: $Na^{+}$, $Ne$, $O^{2−}$ have 10 electrons in two energy levels with 11, 10, and 8 protons respectively. The increased number of protons has a greater pull on the 10 electrons and reduces the radius. $Ca^{2+}$ has 18 electrons in 3 energy levels and is therefore, the largest.
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