H2molekyyli

H2molekyyli, commonly known as molecular hydrogen or simply hydrogen gas, is a chemical compound composed of two hydrogen atoms covalently bonded together. Its chemical formula is H2. It is the simplest and most abundant chemical substance in the universe, making up about 75% of all baryonic mass. At standard temperature and pressure, H2molekyyli is a colorless, odorless, tasteless, highly flammable gas. It exists as diatomic molecules.

H2molekyyli is formed through various processes, including stellar nucleosynthesis, where it is produced in stars through nuclear fusion. On Earth, it can be found in small quantities in the atmosphere and is generated through biological processes like the metabolism of certain bacteria, as well as through industrial methods such as steam reforming of natural gas or electrolysis of water.

Due to its high reactivity, H2molekyyli often combines with other elements. It plays a crucial role in various chemical reactions and industrial applications. For instance, it is used in the production of ammonia, methanol, and in the hydrogenation of oils and fats. Scientists are also exploring its potential as a clean energy source, as its combustion produces only water. However, its high flammability requires careful handling and storage.