Use VSEPR theory to predict the electron group arrangement around iodine, the central atom in the ion IF₂⁻_. A)Octahedral B)Trigonal bipyramidal C)Tetrahedral D)Trigonal planar E)Bent

Question

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The ion has 7 valence electrons from Iodine, 6 electrons from Fluorine and an additional electron to give a -1 charge. Thus there are a total of 14 electrons in the ion.
In order to determine the electron group arrangement around iodine, we must first determine the steric number, which is the sum of the number of atoms bonded to the central atom and the number of lone pairs on the central atom. 
In this case, there are 5 fluorine atoms bonded to iodine and one lone pair of electrons on iodine. Thus the steric number is 6.
According to VSEPR theory, a steric number of 6 corresponds to a trigonal bipyramidal electron group arrangement.

Use VSEPR Theory to Predict the Electron Group Arrangement Around