To calculate the formal charge of the chlorine atom in the ClO2 molecule, we can use the following formula:Formal charge = Valence electrons of the atom - Non-bonding electrons - 0.5 * Bonding electrons In the case of ClO2, the chlorine atom is the central atom, and it is bonded to two oxygen atoms. The Lewis structure of ClO2 is: O ||Cl - O | ONow let's calculate the formal charge of the chlorine atom:1. Valence electrons of chlorine: Chlorine is in Group 7A, so it has 7 valence electrons.2. Non-bonding electrons: In the Lewis structure, there are 2 lone pairs on the chlorine atom, which means there are 4 non-bonding electrons.3. Bonding electrons: There are two single bonds and one double bond between chlorine and the oxygen atoms. Each single bond has 2 electrons, and the double bond has 4 electrons. So, there are a total of 2 + 2 + 4 = 8 bonding electrons.Now, we can plug these values into the formula:Formal charge of Cl = 7 - 4 - 0.5 * 8 Formal charge of Cl = 7 - 4 - 4Formal charge of Cl = -1So, the formal charge of the chlorine atom in the ClO2 molecule is -1.