Ionic Compound Formation Explained

The video tutorial explains how to determine the charges of various ions and write formulas for ionic compounds. It covers the formation of positive ions by metals and negative ions by non-metals, using group numbers to predict charges. Transition metals, which can have variable charges, are also discussed. The tutorial introduces polyatomic ions and their significance in chemical reactions. Finally, it demonstrates how to balance ionic charges to write correct chemical formulas.

Which group does sodium belong to, and what charge does its ion typically have?

• Group 3, 3+ charge

• Group 2, 2+ charge

• Group 4, 4+ charge

• Group 1, 1+ charge

How many electrons does phosphorus need to gain to achieve a full outer shell?

• 4 electrons

• 3 electrons

• 2 electrons

• 1 electron

Which of the following ions is formed by gaining electrons?

• Fe2+

• Cu+

• Cl-

• Na+

What is the charge of an iron ion in iron(III) chloride?

• 3+

• 2+

• 1+

• 4+

What is the charge on a zinc ion typically found in compounds?

• 3+

• 4+

• 2+

• 1+

Which of the following is a polyatomic ion?

• Na+

• Cl-

• NH4+

• O2-

What is the chemical formula for aluminum nitrate?

• Al(NO3)3

• Al(NO2)3

• Al(NO3)2

• Al(NO2)2