The coordination number of each ion in NaCl is:
Correct answer: C. 6
- A. 4
- B. 8
- C. 6
- D. 10
Explanation
In NaCl, each Na+ ion surrounded by six Cl- ions and each Cl- ion is surrounded by six Na+ ions.
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About Shape of Ionic Crystals
Ionic crystal shape depends on the regular arrangement of oppositely charged ions in a three-dimensional lattice. The topic covers coordination number, radius ratios, lattice geometry and structures such as sodium chloride, caesium chloride and zinc sulfide, which should not be confused with the molecular shapes predicted by VSEPR theory.
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