Answer:
Explanation:
Polar covalent bonds are formed when the electrons are not shared equally.
The unequal sharing of electrons happens when the electronegativities of the atoms that form the bonds are different.
The electronegativity of hydrogen atoms is found to be 2.20 and that of oxygen is 3.44.
So, the electronegativity difference found in a H - O bond is 3.44 - 2.20 = 1.24.
That means that oxygen atoms pull the electrons more strongly than hydrogen atoms, which results in that the electrons spend more time closer to the hydrogen atoms than to the oxygen atoms.
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