What is the molecular geometry of the #NO_3^–# ion?

1 Answer
Apr 18, 2016

Answer:

Trigonal planar.

Explanation:

There are #3xx6+5+1=24# valence electrons. A Lewis structure of #(O=)N^+(-O)_2^-# is reasonable. Because there are 3 regions of electron density around the central nitrogen, trigonal planar geometry is suggested.

Note that in the given Lewis structure, 3 of the 4 atoms bears a formal charge. The sum of the formal charges: #+1-1-1# is the charge on the ion.