Answer: 8 and 8.
- A 4 and 4
- B 6 and 6
- C 8 and 8
- D 4 and 8
Correct answer: C. 8 and 8
Explanation: CsCl has a body-centred cubic arrangement where each Cs⁺ is surrounded by 8 Cl⁻ and vice versa; CN = 8:8.
The three cubic unit cells: Simple Cubic has atoms only at corners; Body-Centred adds one atom at the centre; Face-Centred adds one atom at the centre of each of the 6 faces, giving the highest packing efficiency.
Concept context
Explore the ordered world of crystalline solids: unit cells, packing, defects, and how structure determines electrical and magnetic properties.