LESSON 3

• POLARITY - Is a separation of electric charges leading

  to a molecule or its chemical groups having an electric dipole movement, with a negatively charged end and a positively charged end.
• POLARITY - Polar molecules must contain polar bonds

  due to a difference in electronegativity between the bonded atoms.
• BOND POLARITY 


  NONPOLAR COVALENT - Bonding electrons

  shared equally between two atoms. No charges on atoms.
• BOND POLARITY 


  POLAR COVALENT BOND - Bonding electrons shared unequally between two atoms. Partial charges on atoms.
• BOND POLARITY


  IONIC BOND - Complete transfer of one or more valence

  electrons. Full charges on resultin ions.
• BOND POLARITY


  LINUS PAULING - Pauling scale of electronegativity
• LINUS PAULING


  NON POLAR (COVALENT BOND) - 0.0-<0.40 POLAR ( COVALENT BOND) - >0.41 - <1.7 IONIC (BOND) - > 1.71