Covalent network solids are characterized by what type of bonding throughout the lattice?

Covalent network solids are characterized by what type of bonding throughout the lattice?

• A. Ionic bonds
• B. Intermolecular forces only
• C. Metallic bonds
• D. Covalent bonds throughout the lattice

Answer: (D)

Covalent network solids are held together by covalent bonds that form a continuous network throughout the entire lattice. Each atom shares electrons with multiple neighbors, creating a rigid, extended structure rather than separate molecules held together by weaker forces. This is why such solids tend to have very high melting points and be extremely hard. The other options describe different bonding schemes (ionic lattices of ions, metallic bonding with a delocalized electron sea, or molecules held together by weaker intermolecular forces), which do not account for the interconnected, networked covalent bonds that characterize these solids.

Covalent network solids are held together by covalent bonds that form a continuous network throughout the entire lattice. Each atom shares electrons with multiple neighbors, creating a rigid, extended structure rather than separate molecules held together by weaker forces. This is why such solids tend to have very high melting points and be extremely hard. The other options describe different bonding schemes (ionic lattices of ions, metallic bonding with a delocalized electron sea, or molecules held together by weaker intermolecular forces), which do not account for the interconnected, networked covalent bonds that characterize these solids.