3.3: Polarity of Molecules

Question 1

What is a non-polar covalent bond?

Answer 1

Atoms of same/similar electronegativity bond together. Both will equally pull on shared electron pairs.

Question 2

What is a polar covalent bond?

Answer 2

Atoms of relatively differing electronegativities bond. They will pull on shared electron pairs at different strengths. (element with higher EN will have partial negative charge S-)

Question 3

What are non-polar molecules?

Answer 3

• Contain polar or non-polar bonds
• Symmetrical (charge)
• CO2, methane

Question 4

What are polar molecules?

Answer 4

• Contain polar bonds
• Asymmetrical
• water, ammonia