Question

structure 3: :n - n≡o: formal charge for o = 0 formal charge for n (left)=0 formal charge for n (center)=1 formal charge for o = 1 part: 2 / 3 part 3 of 3 identify the most important resonance structure. select the single best answer. :n=n=o: :n≡n - o: :n - n≡o:

Explanation:

The most important resonance structure is the one with the lowest formal - charge separation and the most electronegative atom (Oxygen) having a negative formal charge if possible. In the first structure $\ddot{N}=N=\ddot{O}$, the formal charges are well - distributed and minimized. In the second structure $:N\equiv N-\ddot{O}:$, and the third structure $:\ddot{N}-N\equiv O:$ there are more formal charges present.

Answer:

$\ddot{N}=N=\ddot{O}$