Explain why hydrogen bonding occurs between water molecules

Water molecules have a molecular formula of H2O. The O-H bond in water is a polar bond. This is because there is a big difference in electronegativity between the oxygen and the water. It is known that oxygen is very electronegative, therefore it attracts the electrons creating a polar bond. This means the oxygen is slightly negatively charged and the hydrogen is slightly positively charged. This allows for hydrogen bonding to occur between oxygens and hydrogens of different water molecules. Hydrogen bonding is an intermolecular force and this means it directly affects the physical properties of the molecule.