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

April 26, 2017Chemistry Iodide ions Mathematics nai negative positive sodium

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

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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!