Question
Bromine is a highly reactive liquid while krypton is an inert gas. Explain this difference based on their electron configurations.
Step 1
The electron configuration of bromine (Br) is $[Ar] 3d^{10} 4s^{2} 4p^{5}$ and for krypton (Kr) is $[Ar] 3d^{10} 4s^{2} 4p^{6}$. Show more…
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