Cobalt and Oxygen Chemistry Concepts

The video tutorial explains how to write the formula for Cobalt 2 Oxide. It begins by identifying the element symbols for Cobalt and Oxygen. The tutorial then discusses the ionic charges of Cobalt, a transition metal, and Oxygen, using the periodic table. It highlights the importance of balancing these charges to form a neutral compound, resulting in the formula for Cobalt 2 Oxide.

What is the correct symbol for Cobalt when writing chemical formulas?

• CO

• Co

• C

• Cb

Which group on the periodic table does Oxygen belong to?

• Group 14

• Group 16

• Group 12

• Group 18

What is the ionic charge of Cobalt in Cobalt 2 oxide?

• 1+

• 2+

• 3+

• 0

What is the ionic charge of Oxygen in Cobalt 2 oxide?

• 0

• 3-

• 2-

• 1-

Why is Cobalt 2 oxide considered a neutral compound?

• The charges of Cobalt and Oxygen balance each other out.

• It has equal numbers of protons and electrons.

• It is a noble gas.

• It does not react with other elements.

What is the final chemical formula for Cobalt 2 oxide?

• CoO2

• Co2O3

• CoO

• CO2