The central nitrogen atom in the no2- ion has nonbonded electron pairs and bonded electron pairs in its valence shell.

1 pair of nonbonded electrons

3 pairs of bonded electrons

Explanation:

N has 5 electrons in its valence shell while O has 6.

Lewis structure of NO²⁻ is in the image.

N is in the middle of the structure because is the less electronegative atom. 3 electrons of this atom are forming the bonds and 2 electrons are nonbonded.

As you can see, N has 3 pairs of electrons forming 3 bonds with Oxygens and there is 1 pair of nonbonded electrons.

> b takes place in the gas phase in an isothermal tubular reactor. the feed is one mole of a per one mole of c, an inert. the entering temperature and pressure are 427°c and 10 atm, respectively. the gas constant r = 0.08206 atm · l/mol · k.