Indicate which is larger in each of the following two sets. (I)Cr³⁺ or Cr (II)Se^2- or Se A)Cr³⁺ is larger than Cr and Se^2- is larger than Se. B)Cr³⁺ is larger than Cr and Se is larger than Se^2-. C)Cr is larger than Cr³⁺ and Se^2- is larger than Se. D)Cr is larger than Cr³⁺ and Se is larger than Se^2-.

Question

Quizplus · Accepted Answer

Cr is larger than Cr³⁺ because losing electrons reduces electron-electron repulsion and the size of the electron cloud. Se^2- is larger than Se because gaining electrons increases electron-electron repulsion and the size of the electron cloud.

Indicate Which Is Larger in Each of the Following Two