Ionic Compounds and Charge Balancing

This video tutorial explains how to write the formula for magnesium nitride, an ionic compound. It begins by identifying magnesium and nitrogen as the elements involved, with magnesium being a metal and nitrogen a non-metal. The tutorial then demonstrates how to use the periodic table to find their charges and apply the crisscross method to derive the formula Mg3N2. The video concludes by verifying the neutrality of the compound and confirming the correctness of the formula.

What type of compound is formed between magnesium and nitrogen?

• Molecular compound

• Metallic compound

• Ionic compound

• Covalent compound

What is the charge of magnesium when it forms an ionic bond?

• 1+

• 0

• 3+

• 2+

What is the charge of nitrogen in an ionic compound?

• 3-

• 0

• 2-

• 1-

Which method is used to balance the charges in magnesium nitride?

• Addition method

• Cross-multiplication method

• Crisscross method

• Substitution method

What is the correct formula for magnesium nitride?

• MgN

• MgN2

• Mg2N3

• Mg3N2

How many magnesium ions are needed to balance the charge of two nitride ions?

• Two

• Four

• Three

• One

What is the total positive charge contributed by magnesium ions in magnesium nitride?

• 6+

• 4+

• 8+

• 2+

What is the total negative charge contributed by nitride ions in magnesium nitride?

• 2-

• 4-

• 6-

• 8-

Why is it important to ensure the charges in magnesium nitride add up to zero?

• To make the compound colorful

• To make the compound reactive

• To make the compound stable

• To make the compound magnetic

What is the final step in confirming the formula for magnesium nitride?

• Adding more magnesium

• Removing the charges

• Changing the formula

• Adding more nitrogen