High School

Calculate the formal charges on each of the nitrogen atoms in the [tex]$N_3^-$[/tex] ion shown. The overall charge of the ion has been omitted in the structure.

Answer :

The formal charges on each of the nitrogen atoms in the N3- ion shown are:

- Middle nitrogen atom: 0

- End nitrogen atoms: -1 (x²)

To calculate the formal charges on each of the nitrogen atoms in the N3- ion shown, we need to first determine the valence electrons of nitrogen. Nitrogen has five valence electrons, so in the N3- ion, there are a total of 15 valence electrons (5 valence electrons per nitrogen atom).

To calculate the formal charge, we need to subtract the number of non-bonded electrons (lone pairs) and half of the bonded electrons from the valence electrons of each nitrogen atom.

For the middle nitrogen atom, it has four non-bonded electrons and two bonded electrons, giving it a formal charge of 0.

For the two end nitrogen atoms, they each have two non-bonded electrons and four bonded electrons, giving them a formal charge of -1.

Overall, the N3- ion has a charge of -3, which is the sum of the formal charges on each nitrogen atom.

In summary, the formal charges on each of the nitrogen atoms in the N3- ion shown are:

- Middle nitrogen atom: 0

- End nitrogen atoms: -1 (x²)

Learn more about N3-ion here,

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