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Oksi-84 [34.3K]
3 years ago
15

Which bond pair does not have a polar covalent bond? P – Cl O – H S – Cl H – Cl Cl – Cl

Chemistry
1 answer:
vesna_86 [32]3 years ago
5 0
So,

A polar covalent bond is a bond between two atoms that has a low electronegativity difference (usually 0.1 < x < 1.9, which is kind of the border between nonpolar covalent and ionic, respectively).  The most prominent example of a polar covalent bond is water, where the oxygen atom has an electronegativity of 3.5 and the hydrogen atoms have electronegativities of 2.1.  The electronegativity difference is 3.5-2.1 = 1.4, which is still in covalent territory, but still a polar bond.  This is why lowercase delta's appear beside oxygen atoms in drawings.

Examining, the four options, we immediately see that option D is Cl-Cl.  A bond between two of the same atoms inevitably implies an electronegativity difference of zero, which means a nonpolar covalent bond: electrons are equally shared.  Anywhere you see two identical atoms bonding (except for metals), you will have a nonpolar covalent bond.

The correct answer is D.


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