Any of these guys have a metallic like structure or metallic crystal structure. So now let's look at the third type of Crystalline Solids known as molecular solids. Now, these crystals, or these Crystalline solids consist of molecules held together by intermolecular forces called down their balls forces. And examples include ice. In other words, when you freeze ice, when you take energy away from water and form ice, the water molecules form a very structured formation. And this creates what we know as ice.