A molecule composed of two hydrogen atoms and one oxygen atom is a molecule of water. The structure of water is written as H20, which signifies that two hydrogen (H) atoms and one oxygen (O) atom make up the molecule.
Water is the most abundant compound found on the surface of the earth. Roughly 70 percent of the planet's surface is covered by water, and it is necessary for all forms of life to survive.
Water is known by several other terms related to its molecular structure. These names include hydrogen oxide, dihydrogen monoxide, hydrohydoxic acid, hydric acid and hydrogen monoxide.