Cobalt and Its Compounds

The video tutorial explains how to name the compound Co2O3. It begins by identifying the elements involved: Cobalt, a transition metal, and Oxygen, a non-metal. The tutorial then describes how to write the names of these elements as they appear on the periodic table. It highlights the importance of considering the charge of transition metals, using the example of Cobalt's charge balancing with Oxygen's to achieve a net charge of zero. The tutorial concludes by explaining how to incorporate Roman numerals into the compound name, resulting in the final name: Cobalt(III) Oxide.

What type of metal is Cobalt classified as?

• Alkali metal

• Transition metal

• Alkaline earth metal

• Noble gas

What is the suffix used for naming the non-metal in Co2O3?

• ous

• ate

• ide

• ite

How many oxygen atoms are present in Co2O3?

• 4

• 3

• 2

• 1

What is the charge of each oxygen atom in Co2O3?

• 1+

• 1-

• 2+

• 2-

What is the total negative charge contributed by the oxygen atoms in Co2O3?

• 2-

• 4-

• 6-

• 8-

What Roman numeral is used to indicate the charge of Cobalt in Co2O3?

• IV

• III

• II

• I

If given the name Cobalt(III) oxide, what would be the charge of Cobalt?

• 3+

• 1+

• 4+

• 2+

What is the chemical formula for Cobalt(III) oxide?

• CoO

• Co2O3

• Co3O4

• CoO2