Bromine (Br) is in Group 17 of the periodic table, and elements in the same group have the same number of valence electrons. Bromine has 7 valence electrons. The element that has the same number of valence electrons as bromine (Br) among the options is chlorine (Cl), which is also in Group 17 and has 7 valence electrons.
So, the correct answer is: chlorine (Cl).