The elements present in the compound is represented by the set of chemical symbols with subscripts where subscripts represents the number of atoms present in the compound, is known as chemical formula.
The chemical symbol for zinc is
and for bromine is
.
The given compound is composed of one zinc atom for every two bromine atoms. The subscript for zinc (
) is 1 for zinc atom and for bromine (
) is 2 for bromine atom. Thus, the chemical formula is
.
Hence, chemical formula for compounds containing one zinc atom for every two bromine atoms is
.