26 Facts About Hydrogen

Hydrogen is the chemical element with the symbol H and atomic number 1.

Hydrogen is nonmetallic, except at extremely high pressures, and readily forms a single covalent bond with most nonmetallic elements, forming compounds such as water and nearly all organic compounds.

Hydrogen plays a particularly important role in acid–base reactions because these reactions usually involve the exchange of protons between soluble molecules.

Hydrogen gas was first artificially produced in the early 16th century by the reaction of acids on metals.

Hydrogen atoms are problematic in metallurgy because they can embrittle many metals.

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Hydrogen is highly soluble in many rare earth and transition metals and is soluble in both nanocrystalline and amorphous metals.

Hydrogen has three naturally occurring isotopes, denoted H, H and H Other, highly unstable nuclei have been synthesized in the laboratory but not observed in nature.

Hydrogen speculated that "inflammable air" was in fact identical to the hypothetical substance called "phlogiston" and further finding in 1781 that the gas produces water when burned.

Hydrogen is usually given credit for the discovery of hydrogen as an element.

Hydrogen was liquefied for the first time by James Dewar in 1898 by using regenerative cooling and his invention, the vacuum flask.

Hydrogen provided the lift for the first reliable form of air-travel following the 1852 invention of the first hydrogen-lifted airship by Henri Giffard.

Hydrogen-lifted airships were used as observation platforms and bombers during the war.

Hydrogen is still used, in preference to non-flammable but more expensive helium, as a lifting gas for weather balloons.

Hydrogen plays a vital role in powering stars through the proton-proton reaction in case of stars with very low to approximately 1 mass of the Sun and the CNO cycle of nuclear fusion in case of stars more massive than our Sun.

Hydrogen is found in the neutral atomic state in the interstellar medium because the atoms seldom collide and combine.

Hydrogen gas is very rare in the Earth's atmosphere because of its light weight, which enables it to escape from the atmosphere more rapidly than heavier gases.

Hydrogen production using natural gas methane pyrolysis is a one-step process that produces no greenhouse gases.

Hydrogen is sometimes produced and consumed in the same industrial process, without being separated.

Hydrogen is commonly used in power stations as a coolant in generators due to a number of favorable properties that are a direct result of its light diatomic molecules.

Hydrogen can be burned to produce heat or combined with oxygen in fuel cells to generate electricity directly, with water being the only emissions at the point of usage.

Hydrogen can be produced when there is a surplus of variable renewable electricity, then stored and used to generate heat or to re-generate electricity.

Hydrogen used in transportation would burn relatively cleanly, with some emissions, but without carbon emissions.

Hydrogen is employed to saturate broken bonds of amorphous silicon and amorphous carbon that helps stabilizing material properties.

Hydrogen is the most abundant element in the human body in terms of numbers of atoms of the element but, it is the 3rd most abundant element by mass, because hydrogen is so light.

Hydrogen gas is produced by some bacteria and algae and is a natural component of flatus, as is methane, itself a hydrogen source of increasing importance.

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Hydrogen poses a number of hazards to human safety, from potential detonations and fires when mixed with air to being an asphyxiant in its pure, oxygen-free form.