The decrease in radius is larger for:
Correct answer: D. Trivalent cations
- A. Divalent cations
- B. Trivalent anions
- C. Divalent anions
- D. Trivalent cations
Explanation
A cation is smaller than the parent atom while an anion is bigger than the parent anion. The size of the cation depends on the charge on the cation. For trivalent cations, since they have lost 3 electrons, the remaining electrons are held more close and the proton/electron ratio is decreased. Therefore, the size of trivalent cations is smaller than all the others.
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About Periodic Properties and Trends
Periodic properties arise from electron configuration and effective nuclear charge, producing trends in atomic and ionic radius, ionization energy, electron affinity, electronegativity, metallic character and reactivity. Comparisons run across periods and down groups, with attention to common exceptions. The topic also relates these trends to the behavior of s-block and p-block elements.
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