We’re being asked to classify each solid as ionic, molecular, metallic, or covalent.
Recall that the types of solids are:
• Ionic solid: composed of a metal and a nonmetal as ions.
• Molecular solid: composed of covalent bonds.
• Metallic solid: composed of metal and another metal or just a metal by itself.
• Covalent solid: also called a network solid where atoms are bonded by covalent bonds in a single continuous network.
All of the following are ionic compounds except __________.