Barium and Nitrate Compounds

The video tutorial explains how to write the formula for barium nitrate. It begins by identifying barium on the periodic table and recognizing nitrate as a polyatomic ion. The tutorial then discusses the ionic charges of barium and nitrate, emphasizing the need for a net charge of zero. The crisscross method is used to balance these charges, resulting in the correct formula for barium nitrate. The video concludes with a verification of the formula.

What is the symbol for barium on the periodic table?

• Ba

• Br

• Be

• B

Which of the following is a polyatomic ion?

• Barium

• Oxygen

• Nitrate

• Chlorine

What is the charge of a nitrate ion?

• -2

• +2

• -1

• +1

In which group of the periodic table is barium found?

• Group 4

• Group 3

• Group 2

• Group 1

What is the charge of a barium ion?

• +2

• -2

• -1

• +1

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

• Cross-multiplication

• Addition

• Crisscross method

• Substitution

Why do we use parentheses around the nitrate ion in the formula?

• To indicate it is a polyatomic ion

• To indicate the number of ions

• To show it is a metal

• To denote it is a non-metal

How many nitrate ions are needed to balance the charge of one barium ion?

• Four

• Three

• Two

• One

What is the net charge of the barium nitrate compound?

• -1

• +1

• +2

• 0

What is the final formula for barium nitrate?

• Ba2(NO3)3

• BaNO3

• Ba(NO3)

• Ba(NO3)2