that water is a chemical compound made up of two hydrogen atoms and a single oxygen atom or H 2 O. For thousands of years, ...

For example, water is a compound of hydrogen and oxygen, chemically joined together. Each of its molecules contains two hydrogen atoms and one oxygen atom. There are very many different compounds ...

Water is a unique compound that is essential to life on Earth ... Many of the familiar properties of water that result in its behavior in soils can be directly related to its molecular structure.