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rjt6250 rjt6250
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11 years ago
A. 5
B. 35
C.18
D. 7
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wrote...
11 years ago
Bromine (Br) is in the 2nd to the last column. The elements in the last column have a full outer shell, with 8 electrons (except Helium, whose shell can only hold 2).

The elements in the 2nd-to-last column have one less electron.
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