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A water molecule is held together by two single polar covalent bonds. 2. Because oxygen has a greater electronegativity than hydrogen, water molecules are polar with two partial negative charges near the oxygen atom and one partial positive charge near each hydrogen atom. 3. Atoms differ in their affinity for neutrons, a property called electronegativity.
bonds between Oxygen and Hydrogen are polar covalent bond due to difference in electronegativity between hydrogen and oxygen while the one between the water molecules are hydrogen bonds due to high electronegativity of oxygen which where lone pair of electrons from an oxygen atom in a water molecule are donated to a partially charged proton (hydrogen atom with no electron) from another water molecule hydrogen bonds are much weaker than polar covalent ones