* Aluminum (Al) is a metal in group 3, meaning it typically forms a +3 charge (Al³⁺).
* Bromine (Br) is a nonmetal in group 17, meaning it typically forms a -1 charge (Br⁻).
To form a neutral compound, you need three bromide ions (3 x -1 = -3) to balance out the +3 charge of the aluminum ion.
Therefore, the compound is Aluminum bromide (AlBr₃).
