LESSON 1 IMF

• Intermolecular Forces of Attraction


  force that holds molecules together which can be attractive or repulsive
• Molecule


  formed when two or more atoms join together cheically
• Diatomic atoms


  made of 2 atoms of the same element
• IMF

  attractive forces between ions, molecules and or between ions and molecules
• Intramolecular forces of attraction


  forces that hold atoms within a molecule
• what are the measures of intermolecular force

  boiling point, melting point, Hvap, Hfus, Hsub
• Ions


  charged atoms
• Cations

  positively charged
• Anion


  negatively charged
• dipole


  pair of equal and opposite electric charge separated by a small distance
• Van der Waals Force


  has temporary dipole, weakest
• London Dispersion Force


  Van der Waals is also known as?
• NOnpolar molecule (Van der Waals)

  have no permanent dipole moment
• Dipole-Dipole force


  strongest type of IMF
• Johannes Diderik Van der Waals

  who created the term London Dispersion Force?
• NOv. 23, 1837


  Johannes Diderik Van der Waals was born on?
• Leyden Netherlands


  JOhannes was born at?
• dipole-dipole 


  have permanent dipole
• increased melting/ boiling point 


  in dipole dipole interaction, increased in molar mass means
• permanent dipole


  polar molecules
• Hydrogen bonding


  special type of dipole-dipole force
• Hydrogen bonding- N,O, F


  between hydrogen atom in a polar molecule and highly electronegative atoms
• Polar molecule


  permanent dipole
• Nonpolar molecule


  no separatin of charges
• Nonpolar molecule 


  no positively vharged or negatively charged poles are formed