Calcium Compounds and Ionic Bonds

The video tutorial explains how to write the chemical formula for calcium chloride. It begins by identifying calcium and chlorine, then discusses the ionic nature of the compound. The tutorial explains how to balance charges using subscripts and introduces the crisscross method to determine the correct formula, resulting in CaCl2.

What is the chemical symbol for calcium?

• C

• K

• Cl

• Ca

Why is calcium chloride considered an ionic compound?

• Because it is made of two metals

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

• Because it is made of two non-metals

• Because it is made of two gases

What is the charge of a calcium ion?

• -2

• -1

• +2

• +1

How many chlorine atoms are needed to balance the charge of one calcium ion?

• Three

• Four

• Two

• One

What is the net charge of a balanced calcium chloride compound?

• -1

• +1

• 0

• +2

What is the purpose of the crisscross method?

• To determine the subscripts in ionic compounds

• To calculate the molecular weight

• To find the number of protons

• To determine the atomic mass

In the crisscross method, what do you do with the charge of the calcium ion?

• Use it as the subscript for calcium

• Use it as the subscript for chlorine

• Ignore it

• Add it to the chlorine charge

What is the final chemical formula for calcium chloride?

• Ca2Cl2

• Ca2Cl

• CaCl2

• CaCl