Answer
The nitrogen will have one lone pair.
Both oxygens have 2 lone pairs.
Work Step by Step
For the nitrogen:
1. Find the amount of electrons that the atom has:
A nitrogen with a neutral formal charge has 5 electrons on the valence shell.
2. Calculate the difference between this number and the number of bonds.
5 electrons - 3 bonds = 2 free electrons
2 free electrons = 1 lone pair
For the oxygens:
1. Find the amount of electrons that the atom has:
An oxygen with a neutral formal charge has 6 electrons on the valence shell.
2. Calculate the difference between this number and the number of bonds.
6 electrons - 2 bonds = 4 free electrons
4 free electrons = 2 lone pairs
