We are being asked to identify the resonance forms of nitrite (NO2-)
We will have to draw the Lewis Structure of NO2- first.
Step 1: Determine the central atom in this molecule.
• N → less electronegative atom than O → central atom
Step 2: Calculate the total number of valence electrons present.
Group Valence Electrons
N 5A 5 valence e‑
O 6A 6 valence e- x 2
= 17 valence e‑
-1 charge +1 e-
Total = 18 valence e-
Step 3: Draw the Lewis Structure for the molecule
Sodium nitrite, which has been used to preserve bacon and other meats, is an ionic compound. Write the resonance forms of the nitrite ion, NO2–.