Barium Compounds and Ions

The video tutorial explains how to write the chemical formula for barium sulfate. It begins by identifying barium on the periodic table and recognizing sulfate as a polyatomic ion. The tutorial discusses the ionic nature of the compound, emphasizing the importance of balancing charges to achieve a neutral compound. Barium has a 2+ charge, and sulfate has a 2- charge, which together result in a neutral compound. The final formula for barium sulfate is presented as BaSO4.

What is the symbol for barium on the periodic table?

• B

• Ba

• Br

• Be

Which of the following is a polyatomic ion?

• Chlorine

• Oxygen

• Sulfate

• Barium

What type of compound is formed between a metal and non-metals?

• Hydrogen

• Metallic

• Ionic

• Covalent

What is the charge of sulfate in the compound barium sulfate?

• 0

• 2+

• 1-

• 2-

How do the charges of barium and sulfate combine in barium sulfate?

• They add up to 1+

• They add up to 2-

• They add up to 2+

• They add up to zero

What is the final chemical formula for barium sulfate?

• Ba(SO4)2

• Ba2SO4

• BaSO4

• BaSO3