Presentation is loading. Please wait.

Presentation is loading. Please wait.

Electronegativity and Polarity

Similar presentations

Presentation on theme: "Electronegativity and Polarity"— Presentation transcript:

1 Electronegativity and Polarity

2 Electronegativity The ability of an atom to attract electrons when bonded Nonmetals have high electronegativity Metals have low electronegativity Electronegativity increases across a period and decreases down a group

3 Nonpolar Covalent Bond
When electrons are shared between 2 atoms, a covalent bond is formed. If the atoms are identical, e.g. Cl2, the electrons are shared equally (nonpolar)

4 Polar Covalent Bond If the electrons are shared between 2 different atoms, e.g. HBr, the sharing is unequal The bonding electrons spend more time near the more electronegative atom H Br

5 Electronegativity Differences
The absolute value of the difference in electronegativities of two bonded atoms provides a measure of polarity of a bond. The greater the difference, the more polar the bond. 0 to 0.4 Nonpolar covalent 0.41 to 1.69 Polar covalent > 1.7 Ionic Electronegativity Difference

6 Polar Molecules Note: Not all molecules with polar bonds are polar molecules

Download ppt "Electronegativity and Polarity"

Similar presentations

Ads by Google