Electronegativity and Bond Classification

The video explores whether iron III oxide (Fe2O3) is ionic or covalent. Initially, it is classified as ionic based on the periodic table, as it consists of a metal and a non-metal. However, the electronegativity difference between iron and oxygen is 1.7, which suggests a polar covalent bond. The video discusses how different definitions might classify Fe2O3 differently, emphasizing the importance of understanding the criteria used for classification.

What is the initial conclusion about the nature of Fe2O3 based on the periodic table?

• Nonpolar

• Metallic

• Ionic

• Covalent

What is the electronegativity value of iron?

• 4.0

• 3.5

• 2.5

• 1.8

How is the electronegativity difference between iron and oxygen calculated?

• By multiplying their values

• By dividing oxygen's value by iron's

• By subtracting iron's value from oxygen's

• By adding their values

What is the electronegativity difference between Fe and O?

• 1.7

• 2.5

• 1.5

• 2.0

Where does Fe2O3 fall on the electronegativity continuum?

• Polar covalent

• Nonpolar

• Ionic

• Metallic

According to some textbooks, what electronegativity difference is considered ionic?

• 2.0 and above

• 1.7 and above

• 2.5 and above

• 1.5 and above

What factor can change the classification of Fe2O3 from ionic to polar covalent?

• The color of the compound

• The temperature

• The textbook definition used

• The phase of the compound

What should you check to determine if Fe2O3 is ionic or covalent?

• The color of the compound

• The phase of the compound

• The temperature at which it is measured

• The definition of ionic and covalent bonds used