Ishanee's+Cool+Topic+Thinger

= Intermolecular Forces = There are three main types: 1) __Dipole-dipole__ -between polar molecules -eg. HCl is polar covalent -Negatively charged Cl is attracted to positively charged H [] 2) __Hydrogen Bonding__ -strongest permanent dipole-dipole -occurs when Hydrogen bonds with Oxygen, Fluorine, or Nitrogen -negatively charged F is attracted to positively charged H [] 3) __London Forces__ -exist between all molecules, weakest intermolecular force -occurs when molecule becomes temporarily polar: electron density moves around, and is generally not distributed throughout molecule evenly -this creates a temporary dipole -negatively charged side of molecule is attracted to positively charged side of another []