Oxygen is represented by the red ball in the model.
In a water molecule, the angle formed by the two hydrogen atoms is roughly 104.5 degrees. The repulsion between the oxygen atom's lone pairs of electrons causes the bent form. Water's exceptional solvent qualities, high heat capacity, and capacity to create hydrogen bonds are all a result of its molecular geometry.
The oxygen atom is more electronegative than hydrogen, leading to an uneven distribution of electron density. This results in a partial negative charge on the oxygen atom and partial positive charges on the hydrogen atoms.