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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.
Each water molecule consists of three atoms - 2 hydrogen and one oxygen (H2O). The hydrogens are connected to the oxygen by covalent bonds. Water molecules have a partial charge because the electrons in each covalent bond between the oxygen and each hydrogen are unequally shared-the electrons are closer to the oxygen.This means that each water molecule has a partial negative charge on the oxygen and partial positive charges on the hydrogens.ach water molecule consists of three atoms - 2 hydrogen and one oxygen (H2O). The hydrogens are connected to the oxygen by covalent bonds. Water molecules have a partial charge because the electrons in each covalent bond between the oxygen and each hydrogen are unequally shared-the electrons are closer to the oxygen.