does the central atom have an 8et? calculate the FC of every individual atom in the structure are there better arrangements that could generate a lesser FC?

(if the formula is charged, for ex. via
-1 then one negative FC might be necessary.
continue  
continue     total the FCs of every atom in the formula    
           
          does the above total equal the charge of the formula (or zero if not charged)?  
         
continue
          continue