Which of these comparisons according to radius is (are)correct? 1) Na^+ .>Mg^2+

Question

Which of these comparisons according to radius is (are)correct? 1) Na^+ .>Mg^2+           2) In^3+ >Sr^2+            3) Cl^- > K^+          4) Cl > K a)  1 and2         b) 2 and4          c) 1 and 3        d) 2 and 3        e) 3 and 4 Thank you! Which of these comparisons according to radius is (are)correct? 1) Na^+ .>Mg^2+           2) In^3+ >Sr^2+            3) Cl^- > K^+          4) Cl > K a)  1 and2         b) 2 and4          c) 1 and 3        d) 2 and 3        e) 3 and 4 Thank you!

Explanation / Answer

Rules: 1. Atomic radius decreases as you go from left to right across aperiod. 2. Atomic radius increases as you go down a group. Thus 1 and 3 are the correct answers

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