Problem: Which of the ions listed below would be the smallest? (a) Cl − (b) S 2− (c) K + (d) Ca 2+ (e) They will all be the same size.

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Which of the ions listed below would be the smallest?

(a) Cl 

(b) S 2−

(c) K +

(d) Ca 2+

(e) They will all be the same size.

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Our tutors have indicated that to solve this problem you will need to apply the Periodic Trend: Ionic Radius concept. You can view video lessons to learn Periodic Trend: Ionic Radius Or if you need more Periodic Trend: Ionic Radius practice, you can also practice Periodic Trend: Ionic Radius practice problems .

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