Answer: Covalent network.
- A Ionic
- B Metallic
- C Molecular
- D Covalent network
Correct answer: D. Covalent network
Explanation: In diamond, every carbon atom is covalently bonded to 4 others throughout the entire crystal, making it a covalent network solid.
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.