To calculate the formal charge on the sulfur atom in SO4^2- , we can use the following formula:Formal charge = Valence electrons of the atom - Non-bonding electrons - 0.5 * Bonding electrons For sulfur in SO4^2- :1. Valence electrons of sulfur S = 6 as it is in group 6 of the periodic table 2. Non-bonding electrons = 0 since sulfur is bonded to all four oxygen atoms 3. Bonding electrons = 8 as there are four single bonds between sulfur and the four oxygen atoms, each bond has 2 electrons Now, we can plug these values into the formula:Formal charge on S = 6 - 0 - 0.5 * 8Formal charge on S = 6 - 0 - 4Formal charge on S = 2So, the formal charge on the sulfur atom in SO4^2- is +2.