If a nitride ion has a charge of -3 the ion must have protons electrons and neutrons?

A nitride ion (N³⁻) has a charge of -3, meaning it has three more electrons than protons. Nitrogen has 7 protons in its nucleus, so the nitride ion has 7 protons and 10 electrons. The number of neutrons can vary depending on the isotope, but the most common isotope of nitrogen has 7 neutrons, giving a total of 7 protons, 10 electrons, and 7 neutrons in a nitride ion.