Magnesium and Sulfide Compounds

The video tutorial explains how to write the formula for magnesium sulfide by identifying magnesium as a metal and sulfide as a non-metal, forming an ionic compound. It discusses the importance of charge balancing, with magnesium having a 2+ charge and sulfide a 2- charge, resulting in a net charge of zero. The correct formula for magnesium sulfide is derived as MgS. The tutorial concludes with a summary and thanks from Dr. B.

What type of compound is formed when magnesium and sulfur combine?

• Metallic compound

• Molecular compound

• Ionic compound

• Covalent compound

What is the charge on a magnesium ion?

• 1-

• 2+

• 1+

• 2-

What is the charge on a sulfide ion?

• 1+

• 2-

• 1-

• 2+

Why must the charges on magnesium and sulfide ions add up to zero?

• To form a stable covalent bond

• To ensure the compound is neutral

• To make the compound soluble in water

• To create a metallic bond

What is the correct chemical formula for magnesium sulfide?

• MgS2

• Mg2S

• MgS

• Mg2S3