To determine the number of valence electrons that bromine (Br) has, let's discuss the periodic table and specifically focus on the halogen family.
1. Identify the Group:
- Bromine (Br) is part of the halogen family. Halogens are located in Group 17 of the periodic table.
2. Valence Electrons in Group 17:
- Elements in the same group have the same number of valence electrons. For Group 17, each element in this group has 7 valence electrons.
3. Conclusion:
- Since bromine (Br) is part of Group 17, it has 7 valence electrons.
The correct answer to the question of how many valence electrons bromine has is:
[tex]\[ \boxed{7} \][/tex]
Thus, the correct answer is D. 7.
