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2011-12-07 15:18:50
2011-12-07 15:18:50

Neutral Bromine has three complete rings of electrons. The first ring consists of 2 electrons, the second has 8, the third 18, and the fourth has a maximum capacity of 8 electrons. Bromine only has 7 electrons in it's outer ring, though, so it needs one extra electron to complete it's ring.

So to answer your question, it needs ONE more valence electron.

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