$(i)$ Draw the resonance structures of $N_2O_3$ and state its shape.
$(ii)$ Indicate the bond angles and bond lengths in it.

(N/A) $(i)$ $N_2O_3$ (dinitrogen trioxide) exists as a planar molecule in the gas phase. Its resonance structures involve the delocalization of electrons between the $N-N$ bond and the $N-O$ bonds.
The structure is planar with a $N-N$ bond length of approximately $186 \text{ pm}$. The terminal $N-O$ bond length is $114 \text{ pm}$ (double bond character) and the bridging $N-O$ bond length is $121 \text{ pm}$ (single bond character).
$(ii)$ The bond angle $\angle O-N-N$ is approximately $105^{\circ}$ and the $\angle N-N-O$ is approximately $117^{\circ}$.