Potassium and Nitrate Ions

The video tutorial explains how to write the formula for potassium nitrate. It begins by identifying potassium on the periodic table and recognizing nitrate as a polyatomic ion. The tutorial then discusses the charges of potassium and nitrate ions, emphasizing the need to balance these charges to form an ionic compound. The video concludes by confirming the correct formula for potassium nitrate.

What is the symbol for potassium on the periodic table?

• Pt

• K

• P

• Po

Which of the following is a polyatomic ion?

• Potassium

• Oxygen

• Nitrate

• Chlorine

What is the charge of a potassium ion?

• 0

• +1

• -1

• +2

What is the charge of the nitrate ion?

• -2

• +2

• -1

• +1

Why is it important to balance the charges in an ionic compound?

• To change the compound's color

• To ensure the compound is stable

• To make the compound more reactive

• To increase the compound's weight

What is the correct formula for potassium nitrate?

• KNO2

• K2NO3

• KNO3

• K3NO