Answer:
This question appears to be asking about the nitride ion N^ −3 . All nitrogen atoms, by definition, have 7 protons. The number of neutrons varies depending on the isotope. Most will have 7 neutrons, but stable nitrogen atoms with 8 neutrons also exist. Since our ion has a charge of -3, it must have 3 more electrons than it has protons, so there are 10 electrons in all.
