1 / 9

Polarity

Polarity. How does electronegativity affect the polarity of a covalent bond? How does the shape of a molecule affect the polarity of a molecule?. Polarity. Uneven sharing of electrons. Within a covalent bond Within an overall molecule A molecule can have polar bonds but be nonpolar.

blithe
Download Presentation

Polarity

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Polarity How does electronegativity affect the polarity of a covalent bond? How does the shape of a molecule affect the polarity of a molecule?

  2. Polarity • Uneven sharing of electrons. • Within a covalent bond • Within an overall molecule • A molecule can have polar bonds but be nonpolar. • A molecule can have polar bonds and be polar. • A molecule cannot have nonpolar bonds and be polar!

  3. Bond Polarity • Based on difference in electronegativity between atoms in a bond!

  4. Which bonds are polar covalent? • C—C • C—H • C—O • N—F • Na—Cl

  5. Most electronegative elements: • N, O, F

  6. Polarity is not the whole story…

  7. Just because bonds are polar…doesn’t mean molecule is polar!

  8. How about CH4, CH2Cl2, CH3Cl?

  9. Practice: • In your notebook, draw Lewis structures for the following. Identify individual bond polarities and overall polarity. • Remember, lone pairs attract electrons…so include lone pairs in your diagrams! • Make the models if it makes you feel more comfortable! • BCl3, SiO2, NF3, N2, CCl4,

More Related