Ionic Compounds and Their Charges

The video tutorial explains how to write chemical formulas for compounds involving transition metals, which have variable charges. It covers specific examples such as manganese(IV) oxide, copper(I) oxide, iron(III) oxide, and copper(II) nitride, using methods like the crisscross method to balance charges. The tutorial also addresses compounds with polyatomic ions, emphasizing the importance of using a periodic table and common ion table for accurate formula writing.

What is the charge of elements in group one of the periodic table?

• -1

• +1

• +2

• -2

How do you determine the charge of manganese in manganese(IV) oxide?

• By guessing

• By using a common ion table

• By looking at the periodic table

• By the Roman numeral in the name

What is the correct formula for manganese(IV) oxide?

• MnO

• MnO2

• Mn2O3

• Mn3O4

In copper(I) oxide, what is the charge of copper?

• -2

• +2

• -1

• +1

What is the formula for copper(I) oxide?

• CuO

• Cu2O

• CuO2

• Cu2O3

What method is used to balance charges in iron(III) oxide?

• Guessing

• Periodic table method

• Trial and error

• Crisscross method

What is the formula for iron(III) oxide?

• FeO

• Fe2O3

• Fe3O4

• FeO2

What is the charge of nitrate in copper(II) nitrate?

• +1

• -1

• -2

• +2

How many nitrate ions are needed to balance the charge of copper in copper(II) nitrate?

• 2

• 1

• 4

• 3

What is the formula for copper(II) phosphite?

• CuPO3

• Cu2(PO3)3

• Cu3(PO3)2

• Cu(PO3)2