Question

question 2 of 10
what does the presence of a polar covalent bond show about the
electronegativities of its two atoms?

a. the electronegativities of the two atoms are the same.

b. the effects of electronegativity differences are canceled out.

c. the difference in electronegativities is greater than 1.7.

d. the electronegativities of the two atoms are not equal.

Explanation:

To determine the correct answer, we analyze each option:

• Option A: In a polar covalent bond, electrons are shared unequally, which happens when electronegativities are different, so A is incorrect.
• Option B: Polar covalent bonds result from unequal electronegativity, so differences aren't canceled, making B incorrect.
• Option C: A difference greater than 1.7 indicates an ionic bond, not polar covalent, so C is incorrect.
• Option D: Polar covalent bonds occur when atoms have different electronegativities (but less than 1.7 difference), so D is correct.

Answer:

D. The electronegativities of the two atoms are not equal.