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The chemical formula for water is H2O, which can be represented structurally as H-O-H.

The water molecule is held together by covalent bonds between the hydrogen and oxygen atoms. The water molecule is bent, so that the hydrogen atoms are at one pole of the molecule, and the oxygen atom is at the opposite pole. Because oxygen has a higher electronegativity than hydrogen, the shared electrons are held more tightly by the oxygen atom, giving it a partial negative charge, and the hydrogen atoms have a partial positive charge, therefore the molecule is polar.

Refer to the related links for an illustration of a water molecule. The little d-like symbols are the Greek letter delta, and means partial. So d+ means a partially positive charge.

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Q: How does a molecule of water is polar and represented that with a picture?
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