Mon January 16, 2012 By: Jash Jacob

why are halogens coloured ? Is it because they have unpaired electrons ?

Expert Reply
Mon January 16, 2012
Almost all halogens are coloured. This is because halogens absorb radiations in the visible region. This results in the excitation of valence electrons to a higher energy region. Since the amount of energy required for excitation differs for each halogen, each halogen displays a different colour
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