What is the oxidation state of elemental iodine? What other oxidation states can iodine adopt?
Of elemental iodine......?
Of course, elemental iodine is ZEROVALENT, i.e.
Iodine has multiple possible valances
Iodine when it combines with a metal or an element with low electronegativity becomes -1 This is iodines preferred valance.
When Iodine combines with a non metal with a high electronegativity its valances become positive.
Because Iodine has 7 valance electrons it has multiple possible valance numbers