Answer: Ionic solid.
- A Molecular solid
- B Metallic solid
- C Ionic solid
- D Covalent solid
Correct answer: C. Ionic solid
Explanation: Ionic solids are composed of positively and negatively charged ions held together by electrostatic forces.
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.