Application & Higher Thinking

Question 1

Classify a bond with ΔEN = 0.0

Answer 1

Pure covalent.

Question 2

Classify a bond with ΔEN = 1.2

Answer 2

Polar covalent.

Question 2

Classify a bond with ΔEN = 2.1

Answer 2

Ionic.

Question 2

Classify a bond with ΔEN = 0.3

Answer 2

Nonpolar covalent.

Question 3

Why does a polar covalent bond form partial charges?

Answer 3

Because one atom attracts the shared electrons more strongly, creating uneven electron distribution.

Question 3

Does H₂O contain polar bonds?

Answer 3

Yes.

Question 4

Does CO₂ contain polar bonds?

Answer 4

Yes.

Question 5

(Important Concept)
If a molecule has polar bonds, is it automatically a polar molecule?

Answer 5

No. The shape of the molecule determines whether dipoles cancel.

Question 6

Why is CO₂ nonpolar overall even though its bonds are polar?

Answer 6

Because it is linear and the dipoles cancel each other out.