Chloride ion and potassium ion are isoelectronic. Then
Show Hint
- Their sizes are same
- Cl^- ion is bigger than K^+ ion
- K^+ ion is relatively bigger
- Their sizes depend on other cation and anion
The Correct Option is B
Solution and Explanation
Step 1: Both ions have 18 electrons.
Step 2: Nuclear charge of Cl^- (17) is less than that of K^+ (19).
Step 3: Lower nuclear charge means weaker attraction, hence larger size.
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