Ionic Compounds and Electronegativity

The video explores whether barium nitride (Ba3N2) is ionic or covalent. It begins by identifying barium as a metal and nitrogen as a non-metal, suggesting an ionic compound. The video then calculates the electronegativity difference between barium and nitrogen, finding it to be 2.1. This value is compared to a scale, confirming Ba3N2 as ionic. The video concludes by explaining that Ba3N2 forms a crystal with repeating formula units.

What type of elements are involved in the formation of barium nitride?

• A metalloid and a non-metal

• Two metals

• A metal and a non-metal

• Two non-metals

What is typically indicated by the combination of a metal and a non-metal?

• A covalent compound

• An ionic compound

• A metallic compound

• A polar covalent compound

How do you determine the nature of a compound using electronegativity?

• By adding the electronegativities

• By subtracting the smaller electronegativity from the larger one

• By multiplying the electronegativities

• By dividing the larger electronegativity by the smaller one

What is the electronegativity difference between barium and nitrogen?

• 2.1

• 4.1

• 1.1

• 3.1

Where does a 2.1 electronegativity difference fall on the scale?

• Metallic

• Ionic

• Polar covalent

• Nonpolar covalent

What is a formula unit in the context of ionic compounds?

• A single molecule

• A repeating unit in a crystal lattice

• A single atom

• A covalent bond

What structure does barium nitride form due to its ionic nature?

• A crystal with repeating units

• A molecular structure

• A gaseous structure

• An amorphous solid