Polarity Notes

Bellwork 4/7 -Curves

​Please go to Canvas and complete the bellwork then turn to page 115 and title it Polarity Notes.

IMFs Recap (look at page 69)

Types of IMFs

Weakest to strongest
-London Dispersion Forces: temporary attractions due to electrons
- Dipole-Dipole: 2 polar molecules attract
- Hydrogen Bonds: 2 polar molecules containing H and N or O or F
- Ion-Dipole: An Ion and a polar molecule

​Page 115

Multiple Choice

What is the electronegativity difference range for a polar covalent bond?

• Less than 0.5

• Between 0.5 and 1.7

• Greater than 1.7

• Exactly 0.0

Reorder

Reorder the steps for drawing a Lewis structure.

• Count the total number of valence electrons

• Determine the central atom

• Connect surrounding atoms to the central atom with single bonds

• Place remaining electrons as lone pairs

• Form double or triple bonds if necessary to satisfy the octet rule

1

2

3

4

5

• 1
• 2
• 3
• 4
• 5

Fill in the Blanks

A molecule is nonpolar when the

around the central atom are the same and the shape is symmetrical.

Multiple Select

Which of the following molecules are polar? (Select all that apply)

• CO2

• CH4

• H2O

• CH3Cl

• CCl4

Categorize

Options (6)

NH3

H2O

NO2

CO2

CH4

CCl4

Match each molecule with its polarity.

Polar

Nonpolar