Final answer:
The most common ion charge for bromine is -1. Bromine belongs to Group 7A of the periodic table and tends to gain 1 electron to achieve stability.
Step-by-step explanation:
The most common ion charge for bromine is -1 (C). Bromine belongs to Group 7A of the periodic table, also known as the halogens. It has 7 valence electrons and tends to gain 1 electron to achieve a stable electron configuration, resulting in a charge of -1. For example, when bromine gains an electron, it becomes Br-
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