Question

magnesium bromide is one of the most abundant compounds found in seawater. which formula correctly represents magnesium bromide?
○ mgbr
○ mgbr3
○ mg2br
○ mgbr2

Explanation:

Step1: Determine the charges of ions

Magnesium (\(Mg\)) has a charge of \(+2\) (\(Mg^{2+}\)), and bromide (\(Br\)) has a charge of \(-1\) (\(Br^{-}\)).

Step2: Use the criss - cross method

To form a neutral compound, the number of \(Mg^{2+}\) and \(Br^{-}\) ions should balance the charges. Using the criss - cross method, we get \(MgBr_{2}\).

Answer:

\(MgBr_{2}\) (the fourth option \(MgBr_{2}\))