A molecule is the smallest fundamental unit of a pure chemical compound. It comprises two or several types of atoms. A water molecule is one of the most commonly occurring molecules in nature. It consists of two hydrogen atoms that are chemically bonded to a single oxygen atom.
A water molecule has two electron pairs and two bond pairs. In a molecule, the bond pairs and lone pairs are positioned in a manner that results in the least amount of repulsion between them, based on the valence shell electron pair repulsion, or VSEPR, theory. The tetrahedral electron pair geometry of a water molecule results in its angular form, where the bond angle between the atoms is 104.5 degrees.Learn more about Atoms & Molecules