Coordination Number | MCQs

Explanation

In NaCl, each sodium ion (Na⁺) is surrounded by six chloride ions (Cl⁻) in a cubic close-packed structure.

Therefore, the coordination number of Na in NaCl is 6.

Explanation

 The crystal structures with a coordination number of 12 are Face-Centered Cubic (FCC) and Hexagonal Close-Packed (HCP).

In these structures, each atom is surrounded by 12 other atoms. 

Explanation

: CsCl has a body-centered cubic (bcc) structure, where each Cs⁺ ion is surrounded by 8 Cl⁻ ions and vice versa.