Here's why:

* Oxygen (O) atom: The central atom in a water molecule is oxygen, which has six valence electrons.

* Hydrogen (H) atoms: Two hydrogen atoms bond with the oxygen atom, each sharing one electron.

* Lone pairs: Oxygen has two lone pairs of electrons, which are also negatively charged and repel the bonded hydrogen atoms.

* Bent shape: This repulsion between the lone pairs and the bonded pairs of electrons pushes the hydrogen atoms closer together, resulting in a bent or V-shaped structure.

Think of it like this: imagine the oxygen atom at the center of a triangle, with the two hydrogen atoms at the base and the lone pairs above and below the oxygen atom. This arrangement creates the characteristic bent shape of the water molecule.

This bent geometry has significant implications for the properties of water, including its polarity, hydrogen bonding, and ability to dissolve many substances.