Answer: 6.
- A 4
- B 6
- C 8
- D 12
Correct answer: B. 6
Explanation: In a simple cubic structure, each atom touches 6 neighbours: one on each face direction.
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.