Ionic Compounds and Their Properties

The video tutorial explains how to name the compound BaSO4, known as barium sulfate. It begins by identifying the sulfate ion (SO4) as a polyatomic ion and barium as a metal from group two of the periodic table. The tutorial then outlines the rules for naming ionic compounds, leading to the name 'barium sulfate' for BaSO4. Additionally, it covers how to write the chemical formula from the name by recognizing the ionic charges of sulfate (2-) and barium (2+), which balance to form a neutral compound.

What is the role of SO4 in the compound BaSO4?

• It is a single element.

• It is a polyatomic ion.

• It is a noble gas.

• It is a metal.

Which group on the periodic table does barium belong to?

• Group 4

• Group 1

• Group 2

• Group 3

How is the name 'barium sulfate' derived from BaSO4?

• By combining the names of two metals.

• By combining the names of a metal and a noble gas.

• By using the names of two nonmetals.

• By using the names of a metal and a polyatomic ion.

What is the ionic charge of the sulfate ion in BaSO4?

• 2-

• 1-

• 2+

• 1+

Why do we only need one barium and one sulfate ion to form barium sulfate?

• Because their charges balance to zero.

• Because they both have a 1+ charge.

• Because they are both noble gases.

• Because they both have a 1- charge.