Lesson: Chapter 10 — Chemical Bonds

10.3. Polarity of bonds 5 of 8 Reset answers

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Question 5

Which of these contains a non-polar covalent bond?

A HCl B N₂ C HF D H₂O

The right answer is the one marked above.

N₂. Both atoms are nitrogen, so their electronegativities are identical and the three shared pairs sit symmetrically between them.

In HF, HCl and H₂O the two bonded elements differ in electronegativity, so in each case the bonding pair is pulled towards one atom and partial charges appear.

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