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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.
Hydrogen bonds hold together the atoms in a water molecule. A single water molecule is made up of two hydrogen atoms and one oxygen atom. When a water molecule is formed between hydrogen and oxygen atoms, the oxygen atom ends up with a partial negative charge and the two hydrogen atoms end up with partial positive charges. The hydrogen bonds formed are responsible for the stabilized structure of water.