The video tutorial explains how to write the formula for calcium oxide by using the periodic table to identify calcium and oxygen. It describes the nature of ionic compounds, emphasizing the need to balance the charges of calcium and oxygen to achieve a net charge of zero. The tutorial concludes by presenting the final formula for calcium oxide, CaO, and removing the charges for clarity.

What is the symbol for calcium as found on the periodic table?

• C

• Co

• Ca

• Cl

Why is calcium oxide considered an ionic compound?

• Because it is made of two non-metals

• Because it is made of noble gases

• Because it is made of a metal and a non-metal

• Because it is made of two metals

What is the ionic charge of calcium in calcium oxide?

• 2+

• 2-

• 1+

• 1-

What must the net charge of an ionic compound be?

• Negative

• Zero

• Positive

• Depends on the compound

What is the final formula for calcium oxide?

• CaO

• CaO2

• Ca2O2

• Ca2O