Question

1. determine the formulas of each compound below: name: potassium sulfide, magnesium bromide formula

Explanation:

Step1: Determine potassium ion and sulfide ion

Potassium forms $K^+$ ion with a +1 charge, and sulfur forms $S^{2 - }$ ion with a - 2 charge. To balance the charges, we need 2 potassium ions for 1 sulfide ion.

Step2: Write the formula for potassium sulfide

The formula is $K_2S$.

Step3: Determine magnesium ion and bromide ion

Magnesium forms $Mg^{2+}$ ion with a +2 charge, and bromine forms $Br^-$ ion with a - 1 charge. To balance the charges, we need 2 bromide ions for 1 magnesium ion.

Step4: Write the formula for magnesium bromide

The formula is $MgBr_2$.

Answer:

Potassium Sulfide: $K_2S$
Magnesium Bromide: $MgBr_2$