Ionic Compounds and Charges

The video tutorial explains how to write the formula for potassium nitrite. It begins by identifying potassium on the periodic table and explains that nitrite is not found there but on a common ion table. Nitrite is NO2 with a charge of -1. The tutorial discusses the formation of ionic compounds, emphasizing the need to balance charges to achieve a net charge of zero. Potassium, with a +1 charge, balances with nitrite's -1 charge, resulting in a neutral compound. The video concludes with a summary of the correct structure for potassium nitrite.

What is the symbol for potassium on the periodic table?

• Po

• K

• P

• Pt

Where can you find the information about the nitrite ion?

• On a molecular weight chart

• In a chemistry textbook

• In a common ion table

• On the periodic table

What is the charge of the nitrite ion (NO2)?

• +1

• -2

• -1

• +2

What is the charge of potassium in ionic compounds?

• +1

• -1

• +2

• -2

What is the net charge of a correctly balanced ionic compound?

• -1

• 0

• +1

• +2