Answer: 1/8.
- A 1
- B 1/2
- C 1/4
- D 1/8
Correct answer: D. 1/8
Explanation: A corner atom is shared equally among 8 unit cells, so each cell owns 1/8 of that atom.
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.