Water is composed of hydrogen and which other element?

Water is a chemical compound formed from two hydrogen atoms bonded to one oxygen atom. This combination is represented by the chemical formula H2O. The molecular structure of water is fundamental to its properties and behavior in biological systems and the environment.

Oxygen is essential in this compound as it provides the necessary electronegativity that leads to the polar nature of water, giving it unique solvent properties that are crucial for supporting life. This polar nature allows water to interact effectively with various substances, making it a vital medium for biochemical reactions.

The presence of hydrogen and oxygen in water allows it to maintain its liquid state within a wide range of temperatures, contributing to its role as a universal solvent. Therefore, the inclusion of oxygen is what defines water, making it distinct from other compounds and essential for countless biological and chemical processes.