What is the oxidation number of chlorine in ba clo3 2 July 8, 2019 16 32 64 128 What is oxidation number What are the oxidation numbers of the chlorine and oxygen atoms in the chlorate ion (clo3–) What is the oxidation state of chlorine in the chlorate anion clo3- Clo3 oxidation number Identify the oxidation state of cl in ba(clo2)2. ba ( clo 2 ) 2