Question

how many valence electrons does no₂⁻ possess? numeric type answer here

Explanation:

Step1: Determine valence electrons of each atom

Nitrogen (N) has 5 valence electrons. Oxygen (O) has 6 valence electrons. There are 2 oxygen atoms in \(NO_{2}^{-}\).

Step2: Consider the charge

The negative charge (\(-\)) means an extra electron.
The total valence electrons \(=5 + 2\times6+ 1\)

$$
LATEXBLOCK0
$$

Answer:

18