Answer:
[tex]1s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^62} 4s^{2} 3d^{10} 4p^{5}[/tex] with 7 valence electrons.
Explanation:
Bromine has 7 unpaired (valence) electrons in its outer shell, and a total of 35 elecrons. Its 4s orbital is completely filled with 2 electrons.
The closest answer from the options would be option D.
I hope this helps.
