What is the formal charge on the nitrogen atom in the NO₂^- ion in one of its resonance structures?
In one resonance structure of NO₂^-, N has 1 double bond (4 electrons), 1 single bond (2 electrons), and 1 lone pair (2 electrons). Formal charge = 5 - 2 - 1/2 × 6 = 0.
Ref: NCERT Chemistry Textbook - Latest Edition for Academic Session 2026-27 (Rationalized Textbook for Class XI and XII), Chapter: Chemical Bonding (Latest NCERT 2026-27), Topic: Hybridization of nitrogen in CH₃NH₂, sp³ hybridization and pyramidal geometry