Asked Nov 7, 2019

Which one of these ions has the smallest radius? 

Group of answer choices
a) O2–
b) Cl
c) Na+
d) K+
e) S2–

Expert Answer

Step 1

O2- and Na+ ions are isoelectronic species with [Ne].

Then, rest of other ions Isoelectronic with Argon.  (K+, Cl-, S2- are isoelectronic with Argon).


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