What positive and negative ions are there in sodium iodide (NaI)?

Question

What positive and negative ions are there in sodium iodide (NaI)?

Answer 1

Na+ and I-

Answer 2

Aqueous:

H+, OH-, Na+, I-

Solid:

Na+, I-

Answer 3

Na or sodium is a cation (a positive ion) and I or iodine is an anion (negative ion). When the two make an ionic bond, Na has a charge of positive 1 since it donates 1 electron to Iodine. This means that Iodine must have a charge of negative 1 then since it obtains one extra electron to fill its valence shell. Hope this helps!