Sodium Nitride and Ionic Compounds

The video tutorial explains how to write the formula for sodium nitride by identifying sodium and nitrogen on the periodic table. It discusses the nature of ionic compounds, emphasizing the need to balance charges between metals and non-metals. Sodium has a +1 charge, while nitrogen has a -3 charge. By using three sodium atoms, the charges are balanced, resulting in the formula Na3N. The crisscross method is also demonstrated to verify the formula.

What is the symbol for sodium as found on the periodic table?

• Si

• S

• Na

• N

Why is sodium nitride considered an ionic compound?

• It is made of noble gases.

• It is made of two metals.

• It is made of two non-metals.

• It is made of a metal and a non-metal.

What charge does sodium typically have?

• +1

• -1

• +2

• -2

How many sodium atoms are needed to balance the charge of one nitrogen atom?

• Four

• Three

• Two

• One

What is the formula for sodium nitride?

• NaN3

• Na3N

• Na2N

• NaN

In the crisscross method, what number is moved from nitrogen to sodium?

• 3

• 2

• 1

• 4

What is the final confirmed formula for sodium nitride?

• NaN3

• Na3N

• Na2N

• NaN