Question

what is the chemical formula of aluminum bromide?
a) al₂br₆
b) albr₃
c) al₃br₉
d) al₄br₁₂

Explanation:

Step1: Determine the charges

Aluminum (\(Al\)) has a charge of \(+3\) (\(Al^{3+}\)), and bromide (\(Br\)) has a charge of \(-1\) (\(Br^{-}\)).

Step2: Balance the charges

To balance the charges, we need \(3\) \(Br^{-}\) ions for each \(Al^{3+}\) ion. So the formula is \(AlBr_{3}\).

Answer:

B. \(AlBr_{3}\)