Question

Arrange the highlighted bonds in the table below and decreasing order of polarity. That is, pick one for the most polar bond, pick two for the next most polar bond, and so on

Answer 1

For this exercise we need the polarity of the bonds, for that, we need the electronegativity of the elements from the bonds.

These are nonmetals, so we have covalent bonds.

The 3 of the highlighted bonds are covalent.

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-C-C-

We calculate the polarity as a subtraction:

Polarity (-C-C-) = 0 = 2.5 - 2.5

2.5 is the electronegativity for C

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-C-O-

Polarity (-C-O-) = 3.5 (O) - 2.5 (C) = 1.0

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-C-F-

Polarity (-C-F-) = 4.0 (F) - 2.5 (C) = 1.5

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The electronegativities can be obtained from the Pauling scale.

Now the answer:

Decreasing order of polarity:

-C-F (the most) = 1.5 > -C-O-(the next) = 1.0 > -C-C- (the less) = 0