While finding the formal charge, please explain me how to number the different molecules. For example O3 and how to find the formal charge in this case

Asked by Aayush | 10th Jun, 2013, 03:22: PM

Expert Answer:

      2       1     3
 
     : O ::  O :  O :
       ..            ..
A. The atom in the middle is the central atom, holding the other atoms around it. so obviously the No 1 atom.
B. Other atoms are then accordingly numbered.
C. Formal charge = V(Total valencw e) - 1/2 S(shared e) - L(left off unshared e).
   For O 1   :  6 - 1/2  (6) - 2   = 1.
   For O 2   :  6 - 1/2  (4) - 4   = 0.
   For O 3   :  6 - 1/2  (2) - 6   = - 1
 

Answered by  | 10th Jun, 2013, 04:05: PM

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