Bromide ion cannot donate electrons to iodine as the prior is more electronegative.
They all are Halogens and good oxidizers
It is because bromine is smaller in size than iodine and hence easily reacts. Another reason is that bromine is the more electronegative than iodine and hence it attracts the electrons very easily...
Because they need the same amount of electrons to be filled up and there electronegativity is similar.
Because they share similar quality, properties, and have the same amount of valence electrons.