MOLECULAR POLARITY vs.          BOND POLARITY

 

BOND POLARITY

~ refers to the equal (______________) or unequal (______________) sharing of electrons

 

~ What makes a bond polar (covalent)?

          * If the bond occurs between two _____________________ nonmetals

 

MOLECULAR POLARITY

~ refers to the symmetry (______________) or asymmetry (______________) of a molecule

 

~ What makes a molecule asymmetrical?         

          * If there are ______________________________________ around the central atom.

          and/or

          * If the surrounding atoms are different ____________________________________

 

 

POLAR MOLECULE WITH POLAR COVALENT BONDS


unshared e- pair on central atom makes the molecule polar


bond is between 2 different nonmetals – so bond is polar covalent

 

           

 

NONPOLAR MOLECULE WITH POLAR COVALENT BONDS
 

no unshared e- pairs on central atom

 

                                                 bond is between 2        
AND surrounding atoms are same
different nonmetals, so bond
element, so molecule is NONPOLAR. is polar covalent                              

 



Special Cases Regarding Molecular Polarity:
~ When there are only 2 atoms in the compound or ion…
            * examples:  F2 or HF

 

         

 

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