Copper Compounds and Polyatomic Ions

The video tutorial explains how to write the formula for copper(II) carbonate. It begins by identifying copper and carbonate, noting that carbonate is a polyatomic ion. The tutorial then discusses the ionic nature of the compound, emphasizing the need to balance charges. Copper has a charge of two plus, and carbonate has a charge of two minus, which results in a net charge of zero. The correct formula for copper(II) carbonate is CuCO3. The video concludes with a brief recap of the process.

What is the chemical symbol for copper?

• Cu

• Co

• C

• Ca

Which of the following is a polyatomic ion?

• H2O

• CO3

• O2

• Cu

What is the charge on the carbonate ion?

• 1+

• 2-

• 1-

• 2+

Why is copper(II) carbonate considered ionic?

• It contains only metals.

• It is a covalent compound.

• It contains only nonmetals.

• It contains both metals and nonmetals.

What charge does copper have in copper(II) carbonate?

• 2-

• 1-

• 2+

• 1+

What is the correct formula for copper(II) carbonate?

• Cu2(CO3)2

• Cu2CO3

• CuCO3

• Cu(CO3)2