Answer: Schottky defect.
- A Frenkel defect
- B Metal excess defect
- C Schottky defect
- D Interstitial defect
Correct answer: C. Schottky defect
Explanation: In a Schottky defect, equal numbers of cation and anion vacancies exist, maintaining electrical neutrality.
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.