Question

1. the formula for magnesium hydroxide is

a mgoh
b mg(oh)₂
c mg₂oh
d mg₂(oh)₂

Explanation:

Step1: Determine the charge of magnesium ion

Magnesium (\(Mg\)) is in Group 2 of the periodic table. So, the magnesium ion has a charge of \(Mg^{2 +}\).

Step2: Determine the charge of hydroxide ion

The hydroxide ion is \(OH^{-}\).

Step3: Use the criss - cross method to write the formula

To balance the charges (\(+ 2\) from \(Mg\) and \(-1\) from \(OH\)), we need 2 \(OH^{-}\) ions for each \(Mg^{2+}\) ion. So the formula is \(Mg(OH)_{2}\).

Answer:

B. \(Mg(OH)_{2}\)