Answer: Curved arrows always represent the electron movement
What is purpose to draw curve arrow?
--The purpose of the curved arrow is to show movement of electrons from one site to another.
-- Electrons move from the tail to the head.
--Most of the arrows you'll see have a double-barb at the head, representing the movement of a pair of electrons.
-- The most common use of "curly arrows" is to show the movement of pairs of electrons.
What is Stability ?
--The structure with the least number of formal charges is more stable than those with more.
--The most stable structure will have the negative charge placed on the most electronegative atom.
--The most stable structure will have the positive charge placed on the least electronegative atom.
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