intermolecular forces

• Electronegativity

  An atoms ability to attract electrons
• Intermolecular forces

  The forces that hold molecules together
• Dipole

  A difference in charge
• Permanent dipole-dipole forces

  Forces between molecules that have permanent dipoles
• Most electronegative atoms

  Flourine

  Nitrogen

  Oxygen
• Hydrogen bonds

  When hydrogen bonds with flourine, oxygen or Nitrogen
• London forces


  When temporary dipoles induce dipoles in other molecues via repulsion
• Strength of London forces

  The strength of london forces increase when the number of electrons increase
• Strength of Permanent dipole-dipole forces

  The strength of Permanent dipole-dipole forces depends on the electronegetivity
• General rule for solubility

  Polar substances dissolve in polar substances

  Nonpolar substances dissolve in Nonpolar substances