Chem- Bonding, Structure and Energy Changes

• The four types of solids are: ionic, metallic, molecular and covalent network.
• Ionic solids are made up of a metal and a non-metal.
• Ionic solids are made up of ions held together by strong forces of electrostatic attraction.
• The melting/boiling points for ionic solids are moderately high.
• Ionic solids are hard but brittle
• Ionic solids are soluble in water
• Ionic substances don't conduct when solid, but conduct when molten or in solution.
• Metallic solids are made up of atoms held together by electrostatic force.
• The melting/boiling points for metallic solids is moderately high
• Most metallic solids are hard
• Metallic solids are insoluble
• Metallic solids are very good conductors of electricity and heat
• Molecular solids are made up of molecules held together by weak intermolecular forces
• Molecular solids have low melting/boiling points
• Molecular solids are brittle
• Molecular solids are insoluble and do not conduct
• In molecular solids, there are strong covalent bonds between atoms inside the molecule.
• Covalent network solids are made up of atoms covalently bonded.
• Covalent networks such as diamond and silica have very high melting/boiling points, are very hard, insoluble, and do not conduct.
• Graphite conducts.