
Concept explainers
Interpretation:
The most stable electronic configuration of bromine ion is to be chosen.
Concept introduction:
The ion which achieve nearest noble gas configuration is most stable.

Answer to Problem 7STP
B
Explanation of Solution
Bromine belongs to 17th group. So it has tendency to gain one electron and form most stable ion
Electronic configuration of
Therefore, Electronic configuration of
Option A. This is electronic configuration of bromine atom not ion as there are 35 electrons.
Option C. There should be 3d10 not 4d10 in the electronic configuration.
Option D. This electronic configuration is wrong as 4d cannot be filled before 3d and 4p. Also, the total number of electrons is 35 which is for bromine atom not ion.
Chapter 12 Solutions
World of Chemistry, 3rd edition
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