Electronegativity and Molecular Polarity

The video explores whether nitric oxide (NO) is polar or nonpolar. It begins by examining the electronegativity values of nitrogen and oxygen, noting a difference of 0.4, which suggests a dipole. Although this value is often considered nonpolar, the video explains that nitric oxide is generally seen as polar due to oxygen's higher electronegativity. The conclusion is that nitric oxide is a polar molecule, though it is on the borderline, making it a complex case.

What is the significance of electronegativity in determining the polarity of a molecule?

• It helps in identifying the color of the molecule.

• It indicates how electrons are shared between atoms.

• It determines the size of the molecule.

• It shows the temperature at which the molecule melts.

What are the electronegativity values of nitrogen and oxygen?

• Nitrogen: 2.44, Oxygen: 3.04

• Nitrogen: 3.44, Oxygen: 3.04

• Nitrogen: 2.04, Oxygen: 3.44

• Nitrogen: 3.04, Oxygen: 3.44

What is the difference in electronegativity between nitrogen and oxygen in nitric oxide?

• 0.5

• 0.2

• 0.3

• 0.4

Why does oxygen become more negative in the NO molecule?

• Because it has a higher electronegativity than nitrogen.

• Because it is larger than nitrogen.

• Because it has more protons than nitrogen.

• Because it is closer to the nucleus than nitrogen.

What is the general rule for classifying a molecule as non-polar based on electronegativity difference?

• Difference below 0.3

• Difference below 0.2

• Difference below 0.4

• Difference below 0.5

How is nitric oxide generally classified in terms of polarity?

• Ionic

• Polar

• Metallic

• Non-polar