The correct name for the N3 ion is azide.
Azide is a polyatomic ion consisting of three nitrogen atoms bonded together. It has a formal charge of -1, which contributes to its classification as an ion. Azide is known for its presence in various chemical compounds and has important applications in materials science and pharmaceuticals. The structure of the azide ion can be represented as a linear arrangement of nitrogen atoms, making it unique among other nitrogen-containing ions.