8. Which of the following has the largest Δtet? (A) CrO₄²⁻ (B) MnO₄³⁻ (C) FeO₄²⁻ (D) RuO₄²⁻

4. Both ZnS and CaF₂ have a face-centered cubic unit cell where the S²⁻ and Ca²⁺ ions are closest packed in each structure. Which of the following is true? (A) There are 4 tetrahedral holes empty in each structure. (B) In both compounds, one-half of the tetrahedral holes are filled. (C) In both compounds, all the tetrahedral holes are filled. (D) There are 8 Zn²⁺ ions and 4 F⁻ ions in the unit cell. (E) In ZnS, one-half of the tetrahedral holes are filled by Zn²⁺ ions, whereas in CaF₂ all the tetrahedral holes are filled with F⁻ ions.

8. Which of the following has the largest Δtet?
(A) CrO₄²⁻
(B) MnO₄³⁻
(C) FeO₄²⁻
(D) RuO₄²⁻

相關試題

相關試卷