The element with the highest electronegativity among the options provided is Bromine (Br).
1. Electronegativity is a measure of an atom's ability to attract and hold onto electrons in a chemical bond.
2. In the periodic table, electronegativity generally increases from left to right across a period and from bottom to top in a group.
3. Bromine (Br) is located in the halogen group in the periodic table, which are known to have high electronegativities.
Therefore, among the elements given, Bromine (Br) has the highest electronegativity.
