HELP! How do you find the compound for N3-?

[AliciaS]

For each of the following ions, indicate the total number of protons and electrons in the ion. For the positive ions in the list, predict the formula of the simplest compound formed between each positive ion and the oxide ion. For the negative ions in the list, predict the formula of the simplest compound formed between each negative ion and the aluminum ion.
N3-
protons = 7
electrons = 10
compound = ??

 

[lexa]

there is no compound - it's elemental nitrogen.
I suppose, if it were N2, the normal diatomic form of Nitrogen, you could just call it Nitrogen!