We’re being asked to determine the formal charge of iodine in IF, IF3, IF5, and IF7.
To do so, we need to do the following steps:
Step 1: Determine the central atom in the molecule.
Step 2: Calculate the total number of valence electrons present.
Step 3: Draw the Lewis structure for the molecule.
Step 4: Calculate the formal charge for the indicated atom.
Recall that the formula for the formal charge is:
Iodine forms a series of fluorides (listed here). Write Lewis structures for each of the four compounds and determine the formal charge of the iodine atom in each molecule:
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