The kind of number of atoms and elements in a molecule or a compound is represented by a group of symbols and numbers is known as chemical formula.
The given name of the compound is dibromine silicide. Silicide compounds are those which contain silicon usually with more electropositive elements.
The chemical formula of bromine is [tex]Br[/tex]
The chemical formula of silicon is [tex]Si[/tex]
From the given name it is clear that number of bromine atom is 2.
So, the chemical formula for dibromine silicide is [tex]Br_2Si[/tex].
