Bromine (Br) has 7 valence electrons, as it is in group 17 (the halogens) of the periodic table. The element that has the same number of valence electrons as bromine is selenium (Se), which also has 6 valence electrons since it is in group 16, but it shares similar chemical behavior with Br in reactions and compound formation.
However, for strict sharing of valence electrons, chlorine (Cl) also has 7 valence electrons, the same as bromine.
So, the correct answer is chlorine (Cl).
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