chemical structure and bonds

• ionic bonds are between metals and non-metals
• covalent bonds are between non-metals, shared pair of electrons
• metallic bonds are between metals
• giant metallic structure:

  • solid at room temperature
  • high melting and boiling point
  • conducts as solid, liquid, gas
  • insoluble
• giant ionic structure:

  • solid at room temperature
  • high or very high melting and boiling point
  • only conducts when molten or dissolved in water
  • most are soluble
• melting and boiling points depend on the strength and number of attractive forces between particles in a structure
• small molecules:

  • sometimes solid at room temperature, usually liquid or gas
  • very low or low melting and boiling points
  • poor conductors
  • some are soluble
• giant covalent structure:

  • solid at room temperature
  • very high melting and boiling points
  • poor conductors, only graphite conducts
  • insoluble
• small molecules have covalent bonds