Answer :

Final answer:

Nitrogen in N2- has a negative formal charge because it has gained an extra electron to stabilize the molecule. The negative formal charge typically resides with the more electronegative element, which in this case is nitrogen. The strong triple bond in the molecule contributes to its stability.

Explanation:

Nitrogen has a negative formal charge in N2- because it has gained an extra electron. This extra electron is acquired to stabilize the molecule, resulting in a negative charge on nitrogen. The formal charge on an atom in a molecule is calculated by subtracting the number of bonds and the number of nonbonding electrons from the number of valence electrons in the atom.

The triple bond in the N2 molecule contributes significantly to the stability of this molecule, making it resilient to being broken apart. This strong bond, in conjunction with the extra electron, creates the negative formal charge. Finally, it's essential to note that in a molecule, the negative formal charge typically resides with the more electronegative element, which in this case is nitrogen.

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