magnesium and sulfur\nexpress your answer as a chemical formula.\na chemical reaction does not occur for…

Explanation:

Step1: Determine ion - charges

Magnesium (Mg) is in Group 2 and forms a $Mg^{2 + }$ ion. Sulfur (S) is in Group 16 and forms a $S^{2 - }$ ion.

Step2: Write the chemical formula

Using the criss - cross method, the chemical formula is MgS.

Step3: For barium and bromine

Barium (Ba) in Group 2 forms a $Ba^{2+}$ ion. Bromine (Br) in Group 17 forms a $Br^{-}$ ion.

Step4: Write the chemical formula for barium and bromine

Using the criss - cross method, the chemical formula is $BaBr_{2}$.

Answer:

Part C: MgS Part D: $BaBr_{2}$