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I do not think that Bromine behaves like Krypton in chemical reactions. Krypton is very unreactive due to the fact that it has a full stable set of valence electrons, and Bromine is extremly reactive and has high electronegativity because is does not have a full stable set of valence electrons. Although, I do suppose that if a Bromine atom were to become a negative ion (Br+1) by gaining another electron, it would act as if it were a Krypton atom.
No, bromine behaves more like chlorine and iodine in chemical reactions due to its similar reactivity and properties as other halogens. Krypton, on the other hand, is a noble gas and is chemically inert, meaning it does not readily form compounds and has different behavior compared to halogens like bromine.
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