A network.. where one thing ends another begins
The atom that would gain two electrons to fill its valence energy level is S(sulfur)
This is because s (sulfur) is in atomic number 16 with 2.8.6 of [Ne] 3s^2 2p^4 electronic configuration. This implies that sulfur has 6 valence electron and therefore it require two electron to fill its valence energy level and obtain 18 rule electrons.
The answer is more protons than electrons.
Answer:
HBrO4 < HBrO3 < HBrO2 < HBrO
