Types of Solid MatterCrystalline solids - Particles are arranged in a regular, repeating pattern; have a definite shape and melting point. Examples are salt and diamond.Amorphous solids - Particles lack a regular arrangement; they don’t have a sharp melting point and are more flexible. Examples are glass and rubber.Polycrystalline Solids - Made up of many small crystals or grains, each with ordered structure but randomly oriented.Based on bonding, solids can be:Ionic solids - Made of ions (e.g., NaCl), hard and brittle.Metallic solids - Metal atoms with free electrons, good conductors.Covalent/network solids - Atoms covalently bonded in a network, very hard (e.g., diamond).Molecular solids - Molecules held by weak forces, soft with low melting points (e.g., ice).