Network Covalent Solids: Which is Not an Example?

Which of the following is not an example of a network covalent solid?

a. iron

b. diamond

c. graphite

d. SiC (silicon carbide)

e. SiO2 (sand)

Answer:

Iron is not an example of a network covalent solid as it forms metallic bonds instead of covalent bonds to hold its atoms together.

To determine which of the following options is not an example of a network covalent solid, let's first understand what a network covalent solid is. A network covalent solid is a solid in which the atoms are held together by a network of strong covalent bonds.

Out of the given options, iron is not an example of a network covalent solid. Iron forms metallic bonds instead of covalent bonds to hold its atoms together.

Therefore, the correct answer is a. iron.