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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.
The electron density distribution for water is shown above right with some higher density contours around the oxygen atom omitted for clarity. The polarizability of the molecule is almost isotropic, centered around the O-atom (1.4146 A Ã¥) 3 with only small polarizabilities centered on The-h (atoms.0 0836 a) [ Ã¥ ]. 3 736 parameters using ab initio calculations with-THE** 6 31g basis set are. shown right