Answer: Predicting Relative Sizes of Atomic and Ionic

Chapter , Problem 1PE

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QUESTION:

Problem        1PE

Predicting Relative Sizes of Atomic and Ionic Radii

Arrange Mg2+, Ca2+ , and Ca in order of decreasing radius

Arrange the following atoms and ions in order of increasing ionic radius: F, S2 -, Cl, and Se2- (a) F2 - < CI2 - (b) F2 - < Se2 - (c) F2 - < Se2 - < Cl (d) CI2 - < S2 - (e) S2 - < F2 - < Cl

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QUESTION:

Problem        1PE

Predicting Relative Sizes of Atomic and Ionic Radii

Arrange Mg2+, Ca2+ , and Ca in order of decreasing radius

Arrange the following atoms and ions in order of increasing ionic radius: F, S2 -, Cl, and Se2- (a) F2 - < CI2 - (b) F2 - < Se2 - (c) F2 - < Se2 - < Cl (d) CI2 - < S2 - (e) S2 - < F2 - < Cl

ANSWER:

Step 1 of 2

The given species are , , and Ca. The size of the cation is smaller than its parent atom. Thus, . In a group, magnesium is above from calcium that means the size of magnesium is smaller than calcium. Thus, the order of decreasing radii is .

 

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