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IF₃ has one iodine atom and three fluorine atoms, with iodine as the central atom. Draw one single bond from iodine to each fluorine; each fluorine then has three lone pairs, or six dots. Iodine has two lone pairs, or four dots. These account for all 28 valence electrons (7 from iodine and 21 from the three fluorines), so no additional lines or dots are needed.

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