Question

What kind of bond doesn't form molecules, but instead forms crystals?

Answer 1

ionic bonds

Ionic compounds contain ions of metals and nonmetals held together by ionic bonds. Ionic compounds do not form molecules. Instead, many positive and negative ions bond together to form a structure called a crystal. You can see an example of a crystal in Figure below . It shows the ionic compound sodium chloride. Positive sodium ions  Na +   alternate with negative chloride ions  Cl -  . The oppositely charged ions are strongly attracted to each other.