a binary compound between germanium and bromine would have a formula like:
(a)
To determine the formula of a binary compound between germanium and bromine, we need to consider the charges on the individual ions.
Germanium (Ge) is a metalloid, and it typically forms a +4 charge when it reacts with other elements.
Bromine (Br) is a nonmetal, and it typically forms a -1 charge when it reacts with other elements.
To form a stable compound, the charges of the ions need to balance. In this case, since the +4 charge of germanium needs to balance with the -1 charge of bromine, we need four bromine ions to balance the charge of one germanium ion.
From this, we can determine that the formula for the binary compound between germanium and bromine is GeBr4. So, the answer is:
(a) GeBr4