Calcium and Carbonate Ions Concepts

The video tutorial explains the composition of calcium carbonate (CaCO3), focusing on its ionic components. Calcium, a group 2 element, has a 2+ charge, while the carbonate ion (CO3) has a 2- charge. These charges balance to form a neutral compound. The tutorial details the presence of one calcium ion and one carbonate ion in a formula unit of calcium carbonate, emphasizing the need to memorize the carbonate ion's charge.

What is the ionic charge of calcium in calcium carbonate?

• 1+

• 2+

• 3+

• 0

Which group of the periodic table does calcium belong to?

• Group 2

• Group 4

• Group 3

• Group 1

What is the charge of the carbonate ion in calcium carbonate?

• 2-

• 0

• 1-

• 3-

How do the charges of calcium and carbonate ions combine in calcium carbonate?

• They add up to a positive charge

• They add up to a negative charge

• They do not combine

• They add up to zero

What type of ion is the carbonate ion in calcium carbonate?

• Monatomic ion

• Polyatomic ion

• Cation

• Anion

How many total ions are present in one formula unit of calcium carbonate?

• One

• Two

• Four

• Three