hydrog

Hydrog is not a standard standalone term in science or encyclopedic reference. In practice it is most often encountered as a shorthand or misspelling of hydrogen, or as a form of the prefix hydro- used in water-related terms. As such, a hydrog article typically distinguishes these senses.

Hydrogen is the lightest and most abundant element in the universe, primarily found in stars and gas giant planets. It has the symbol H and atomic number 1. At room temperature it is a colorless, odorless diatomic gas (H2) that is highly reactive and flammable. Hydrogen is a major constituent of water and many organic and inorganic compounds. Industrial production mostly relies on steam methane reforming of natural gas, with electrolysis of water as a method for low-emission or renewable-powered hydrogen. Isotopes include protium (most common), deuterium, and tritium. Uses range from ammonia synthesis and petroleum refining to hydrogen fuel cells and potential clean-energy storage.

The prefix hydro- denotes water or watery interactions. It appears in terms such as hydrography, hydraulics, hydroelectric power, hydrolysis, and hydroponics. The term shapes many scientific and engineering disciplines, from geology and meteorology to biology and environmental science.

While 'hydrog' may appear in branding, fiction, or shorthand, it is not a standardized scientific term. Readers should consult context to determine whether hydrogen-related or water-related meanings are intended.