1 / 6

February 14, 2012

February 14, 2012. AGENDA: 1 – Bell Ringer & Part. Log 2 – Cornell Notes: Electronegativity & Polarity 3 – Review Quiz 4 – Work Time. Today’s Goal: Students will be able to describe how electronegativity affects polarity of bonds. Homework Notes Practice Problems Up-to-date Notebook

aglaia
Download Presentation

February 14, 2012

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. February 14, 2012 AGENDA: 1 – Bell Ringer & Part. Log 2 – Cornell Notes: Electronegativity & Polarity 3 – Review Quiz 4 – Work Time Today’s Goal: Students will be able to describe how electronegativity affects polarity of bonds. Homework • Notes Practice Problems • Up-to-date Notebook • Friday is the Last Day to take Last Week’s Quiz • Last Week’s Work is due by this Friday at the latest

  2. Cornell Notes • Topic: Electronegativity and Polarity • Date: 2/14/2012 • Electronegativity (EN) is the relative ability of an atom to attract electrons in a chemical bond. • Trend: EN gets higher as you go across a period, and lower as you go down a group (except for Noble Gases). • Nonmetals are the most EN type of elements. • The most EN element is Fluorine (top right). • The least EN element is Francium (bottom left). • (Fig. 8.20, page 265)

  3. Fig. 8.20, page 265

  4. Cornell Notes (continued) • A polar covalent bondis a covalent bond where the electrons are not shared equally. It results when the elements have different electronegativities. • If the elements are exactly the same (ex: N2), then the bond is nonpolar. • If there is a very large difference in electronegativities, the bond is ionic. • (Table 8.7, page 266)

  5. Cornell Notes (continued) • A polar covalent bond results in a slight positive or negative charge on either end of the bond. • (Example on page 267, Fig. 8.22)

  6. Practice Problems: • HF • NaCl • SF6 • H2O • CH3Cl • NH3 • CS2 • CCl4 • OF2

More Related