Ionic Compounds and Barium Chloride

The video tutorial explains how to write the formula for barium chloride by examining the periodic table to identify barium and chlorine. It discusses the ionic charges of these elements and the need for a net charge of zero in ionic compounds. The crisscross method is introduced to balance the charges, resulting in the formula BaCl2. The tutorial concludes by verifying the formula and ensuring the net charge is zero.

Which element is represented by 'Ba' on the periodic table?

• Beryllium

• Barium

• Boron

• Bismuth

What type of compound is formed when a metal and a non-metal combine?

• Ionic

• Molecular

• Covalent

• Metallic

What is the ionic charge of barium in barium chloride?

• 2-

• 1-

• 2+

• 1+

What is the ionic charge of chlorine in barium chloride?

• 2-

• 1+

• 2+

• 1-

What method is used to balance the charges in barium chloride?

• Cross-multiply

• Crisscross

• Substitution

• Elimination

In the crisscross method, what happens to the subscript '1'?

• It is not written

• It is doubled

• It is written

• It is squared

How many chlorine atoms are present in the formula for barium chloride?

• 1

• 2

• 4

• 3

What is the net charge of barium chloride when the charges are balanced?

• +2

• -1

• 0

• +1

Who is the presenter of the video tutorial?

• Dr. B

• Dr. A

• Dr. D

• Dr. C