Barium Nitrite and Ionic Compounds

The video tutorial explains how to write the formula for barium nitrite. It begins by identifying barium and nitrite, noting that nitrite is a polyatomic ion. The tutorial then discusses the charges of barium and nitrite ions and demonstrates how to use the crisscross method to balance these charges for a neutral compound. Finally, the video verifies the formula and concludes with the correct representation of barium nitrite as Ba(NO2)2.

What is the symbol for barium on the periodic table?

• Be

• Br

• Ba

• B

Why is nitrite not found on the periodic table?

• It is a polyatomic ion.

• It is a metal.

• It is a transition element.

• It is a noble gas.

What is the charge of the nitrite ion?

• 1-

• 2-

• 1+

• 2+

What is the ionic charge of barium in group two of the periodic table?

• 2+

• 0

• 1+

• 3+

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

• Addition method

• Elimination method

• Substitution method

• Crisscross method

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

• Because there are two nitrite ions.

• Because it is a metal.

• Because it is a single atom.

• Because it is a gas.

What is the final formula for barium nitrite?

• Ba2(NO2)

• Ba(NO2)2

• Ba(NO3)2

• BaN2O4

What is the net charge of the barium nitrite compound?

• 1+

• 2+

• 0

• 2-

What is the purpose of verifying the formula for barium nitrite?

• To ensure the net charge is zero.

• To check if it is a gas.

• To confirm it is a metal.

• To see if it is soluble in water.