# What will be the products if magnesium bromide reacts with chlorine gas?

$\text{MgBr"_2 + "Cl"_2}$$\rightarrow$$\text{MgCl"_2 + "Br"_2}$
Chlorine and bromine are both halogens in group 17/VIIA. The reactivity of the halogens decreases from top to bottom in the group. Chlorine is above bromine, therefore it is more reactive and will replace bromine in $\text{MgBr"_2}$.