Total number of non bonded electrons present in NO 2 - ion based on Lewis theory is .

Chemistry · Chemical Bonding

JEE Main 2025 — 29 January, Evening Shift — Question 16

Total number of non bonded electrons present in $\mathrm{NO}_{2}^{-}$ ion based on Lewis theory is $\qquad$ .

Answer: 12

Numerical answer — enter this value.

Step-by-step solution

$\ce{NO2-}$ has a total of 18 valence electrons. 6 electrons are used in bonding (one $\ce{N=O}$ and one $\ce{N-O}$ ). Remaining electrons are non-bonding (lone-pair) electrons.

18 - 6 = 12

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Exam: JEE Main 2025
Paper: 29 January, Evening Shift
Subject: Chemistry
Chapter: Chemical Bonding
Topic: Introduction to Bonding and Lewis Octet Theory