Bromine (Br) is in Group 17 of the periodic table, which means it has 7 valence electrons. The element that has the same number of valence electrons as bromine is selenium (Se), which is in Group 16 and has 6 valence electrons, which isn't the correct choice.
The correct response should actually be chlorine (Cl), as it is also in Group 17 and has the same number of valence electrons (7).
So the best answer is:
- chlorine (Cl).
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