Question

resonance in n203

Answer 1

The first nitrogen has a lone pair electrons, one single bond with the other nitrogen and a double bond with one oxygen atom (2 lone pairs of electrons). The formal charge on this nitrogen and the oxygen is zero.
The second nitrogen has a single bond to the first nitrogen, a single bond to one oxygen (3 lone pairs of electrons), and a double bond to another oxygen (2 lone pairs of electrons). The formal charge on this nitrogen is +1, on the single-bonded oxygen is -1, and on the double-bonded oxygen is zero.
This structure has a resonance.