With a mass fraction of about 70 percent, hydrogen is the most abundant chemical element in the universe. It is also the lightest element in the universe. It consists of one proton and one electron. Under normal conditions, it occurs as a colorless, odorless gas andisnotpresentas atomic hydrogen (H), but as molecular hydrogen, with the symbolH2. The element is an integral component of nearly all organic chemical substances.
Chemical Properties of Hydrogen
Hydrogen has an atomic number of 1 and an atomic mass of 1.008 u. Under standard conditions (0°C and 1 bar), the gas has a density of 0.09 kg/m³. Its melting point is -259.14°C, and its boiling point is -252.87°C. Due to its high reactivity, hydrogen forms chemical compounds with many other elements.
Occurrence, Extraction, and Applications
In nature, the molecule occurs primarily in bound form in water and organic compounds. It is produced industrially through steam reforming, electrolysis, and gasification of coal or biomass.
The gas is used in various fields:
- Energy Sources in Fuel Cells
- Rocket Fuel
- Raw materials in the chemical industry
- Production of Ammonia and Methanol
- Hydrogenation in the Food Industry
- Storage of Renewable Energy
As a carbon-free energy source, hydrogen plays a key role in the energy transition. It enables the storage and transport of renewable energy. Especially in sectors such as industry, heavy-duty transportation, and aviation, hydrogen is considered a promising alternative to fossil fuels and batteries.
"Back"
