Um, basically, the reason why we can't do after the minuses because of expanded act, you're impossible to do expand.
Ions are the charges we see on the molecules.
As some cations have the theoretical possibility to form compounds with both triiodide and iodide ions, such as , compounds containing iodide anions in a 3:1 ratio should only be referred to as triiodides in cases where the triiodide anion is present.
That'll result in a formal charge of 0 on this Oxygen and a +1 on the Iodine.
There is a one double bond between sulfur atom and oxygen atom.
For understanding the Lewis structure of the molecule, we should know valence of the iodine molecule.