Cobalt Compounds and Ionic Charges

The video tutorial explains how to write the chemical formula for Cobalt 6 oxide. It begins by identifying the element symbols for Cobalt and Oxygen, noting their respective ionic charges. The tutorial then demonstrates how to balance these charges to achieve a net charge of zero, resulting in the formula CO3. Finally, it explains how to name the compound using Roman numerals to indicate the charge on Cobalt.

What is the element symbol for Cobalt?

• Co

• C

• Cb

• Cl

What does the Roman numeral six indicate in Cobalt 6 oxide?

• The atomic number of Cobalt

• The number of oxygen atoms

• The group number of oxygen

• The charge on Cobalt

What is the ionic charge of oxygen in Cobalt 6 oxide?

• 6-

• 2-

• 6+

• 2+

How many oxygen atoms are needed to balance the charge of Cobalt in Cobalt 6 oxide?

• Three

• Four

• Two

• One

What is the chemical formula for Cobalt 6 oxide?

• Co3O

• CoO3

• CO3

• CO2

How is the charge of Cobalt represented in the name of Cobalt 6 oxide?

• As a suffix

• As a subscript

• As a prefix

• As a Roman numeral