Confusion over the Lewis structure of the Nitrate ion,NO3-Watch
Why are some Lewis structures of NO3- are A() and some are B(). What is the difference? Shouldn't it be B as N atom forms a dative bond with one of the O atoms? Thank you
B is one resonance form of the three possible electron arrangements. It is an approximation based on the older ideas of bonding.
In reality there is no difference between the nitrogen oxygen bonds. A more complete picture would show the three N-O bonds 120 degrees apart and equal in length (bond order = 1.33).
So, when we're asked to draw the Lewis structure for this specific ion. Should I include a dative bond arrow in it? Thanks a bunch.