* Nitrogen's Atomic Number: Nitrogen (N) has an atomic number of 7. This means a neutral nitrogen atom has 7 protons and 7 electrons.
* Excess Electrons: The nitrogen atom in question has 10 electrons, which is 3 more than its neutral state.
* Ion Charge: Since electrons have a negative charge, gaining 3 extra electrons gives the nitrogen atom a -3 charge.
Therefore, the ion charge of a nitrogen with 10 electrons is -3, and it's represented as N³⁻.
