Electronegativity and Ionic Compounds

The video tutorial explains two methods to determine if barium fluoride (BF2) is ionic or covalent. The first method involves using the periodic table to identify the elements as metals or non-metals, indicating an ionic compound when a metal and a non-metal are present. The second method uses electronegativity values to calculate the difference between barium and fluorine. A difference greater than 2.0 confirms an ionic compound. Both methods conclude that BF2 is ionic. Dr. B provides a clear explanation and concludes the video by affirming BF2's ionic nature.

What is the first method mentioned to determine if BF2 is ionic?

• Checking the color of the compound

• Using a pH test

• Examining the periodic table for metal and non-metal elements

• Measuring the temperature of the compound

Which elements are identified in BF2 using the periodic table method?

• Boron and Fluorine

• Barium and Fluorine

• Barium and Chlorine

• Boron and Chlorine

What is the second method used to determine if BF2 is ionic?

• Conducting a flame test

• Using electronegativity values

• Checking the boiling point

• Observing the physical state

What is the electronegativity difference between Barium and Fluorine?

• 4.0

• 3.09

• 2.5

• 1.5

What is the threshold electronegativity difference for a compound to be considered ionic?

• 2.0

• 2.5

• 1.5

• 1.0

What conclusion does Dr. B reach about BF2?

• It is a covalent compound

• It is an ionic compound

• It is a metallic compound

• It is a non-metallic compound