No, potassium does not have a greater electronegativity than bromine. Electronegativity is the ability of an atom to attract electrons towards itself in a chemical bond. On the Pauling scale of electronegativity, potassium has a value of 0.82, while bromine has a value of 2.96. This means that bromine has a greater electronegativity than potassium and will attract electrons more strongly in a chemical bond.