The ' Hydrogen on Demand ' process ( see direct borohydride fuel cell ) creates hydrogen as needed, but has other issues, such as the high price of the sodium borohydride that is the raw material.

Hydrogen, for example, with a single proton, has an atomic weight of 1. 007825 u.

Hydrogen has the following advantages:

* Hydrogen has nearly 30 % higher specific impulse ( about 450 seconds vs. 350 seconds ) than most dense fuels.

* Hydrogen has an oxidation state of + 1 except when bonded to more electropositive elements such as sodium, aluminium, and boron, as in NaH,

Methane has only 4 bonds between its single carbon and four Hydrogen atoms.

Under Anderson, Wired has produced some widely noted articles, including the April 2003 " Welcome to the Hydrogen Economy " story, the November 2003 " Open Source Everywhere " issue ( which put Linus Torvalds on the cover and articulated the idea that the open source method was taking off outside of software, including encyclopedias as evidenced by Wikipedia ), the February 2004 " Kiss Your Cubicle Goodbye " issue ( which presented the outsourcing issue from both American and Indian perspectives ), and an October 2004 article by Chris Anderson, which coined the popular term " Long Tail.

Hydrogen is the most abundant element, and it is the basic building block for all other elements as its nucleus has only one proton.

* Hydrogen cyanide, which has the chemical formula HCN

Hydrogen has a relatively low electron affinity, 72. 77 kJ / mol and reacts exothermically with protons a powerful Lewis base.

Hydrogen peroxide has been used for main thrusters and as power source for propellant tank pumps in rockets like the German WWII V-2 ( same as US Redstone rocket ).

According to the South Carolina Hydrogen & Fuel Cell Alliance, the Columbia station has a current capacity of 120 kg a day, with future plans to develop on-site hydrogen production from electrolysis and reformation.

The DIAMEX ( DIAMideEXtraction ) process has the advantage of avoiding the formation of organic waste which contains elements other than Carbon, Hydrogen, Nitrogen, and Oxygen.

Hydrogen absorption by palladium is reversible and therefore has been investigated for hydrogen storage.

Hydrogen sulfide is formed when the washcoat has absorbed sulfur during a low-temperature part of the operating cycle, which is then released during the high-temperature part of the cycle and the sulfur combines with HC.

Hydrogen is often proposed since it has the highest exhaust velocity.

Hydrogen peroxide has the advantage that it decomposes to form oxygen and water thus leaving no long term residues, but hydrogen peroxide as with most other strong oxidants is hazardous, and solutions are a primary irritant.

Hydrogen peroxide, an environmentally-safe bleaching agent that does not create dioxin, has been used with much success in the bleaching of kenaf.

Hypoxia detection has been shown to depend upon increased Hydrogen sulfide generation produced by cystathionine gamma-lyase as hypoxia detection is reduced in mice in which this enzyme is knocked out or pharmacologically inhibited.

General Motors is also a regular sponsor of the event, and has in recent years sponsored the Hydrogen Fuel Cell Car competition held at NSB, where 16 teams compete to build the fastest or most powerful fuel cell-powered miniature car.

Hydrogen has about 8 % more buoyancy than helium.

Hydrogen has a high energy density by weight.

Hydrogen gas must be distinguished as " technical-grade " ( five times pure ), which is suitable for applications such as fuel cells, and " commercial-grade ", which has carbon-and sulfur-containing impurities, but which can be produced by the much cheaper steam-reformation process.

This may also limit identification of Hydrogen in some samples.

Hydrogen is also being developed as an electrical power storage medium.

* Acid salt also known as Hydrogen salt

Hydrogen may fuse to produce a different mixture of isotopes than it does in ordinary stellar nucleosynthesis, and some astronomers have proposed that the rapid proton nucleosynthesis that occurs in supernovae also takes place inside Thorne – Żytkow objects.

Although hydrogen sulphide is toxic in high concentrations, the amount present in kala namak used in food is small and thus its effects on health are negligible: Hydrogen sulphide is also one of the components of the odor of rotten eggs and boiled milk

Hydrogen, which occurs in the compound water, is also classed as an atmophile.

Flame Tests on cations for Alkali, Alkali Earth Metals, and Hydrogen ( see atomic spectroscopy ) ( see also Flame test )

They also have little to no molecular gas ( hence the lack of star formation ) and no significant Hydrogen α or 21-cm emission.

Hydrogen peroxide can also be mixed with formic acid as needed in the Endoclens device for sterilization of endoscopes.

The eastern part of campus is also the home of the Energy and Environmental Research Center complex which includes the National Center for Hydrogen Technology.

Hydrogen also is necessary for building sugars and building the plant.

Hydrogen bromide ( HBr ) also takes this pathway, but sometimes a radical process competes and a mixture of isomers may form.

Unst is also home to the Promoting Unst Renewable Energy ( PURE ) Wind Hydrogen project, a community-owned clean energy system based on hydrogen production.

Hydrogen was also detected in orbiter's aft compartment believed to be associated with a leak involving the 17-inch umbilical assembly.

Hydrogen can also be excited by heat or electricity.

In 2007, the NSB also had Hydrogen Fuel Cell Car race, a lab activity, and a scavenger hunt.

Hydrogen line observations have also been used indirectly to calculate the mass of galaxies, to put limits on any changes over time of the universal gravitational constant and to study dynamics of individual galaxies.

Hydrogen sulfide gas is circulated in a closed loop between the cold tower and the hot tower ( although these can be separate towers, they can also be separate sections of one tower, with the cold section at the top ).

( Not to be confused with Hydrogen Fuel Cell Electric Vehicles which are certified as ZEV or Zero Emission Vehicles ) In addition to the 15 year or 150, 000 mile warranty for zero evaporative ( fuel system ) emissions, and SULEV tailpipe emissions, PHEVs must also warranty their traction battery for 10 years or 150, 000 miles.

US Dentists also offer a specialized Crest Whitestrips called ' Supreme ', which is 80 % more effective than any retail versions due to the higher concentration of Hydrogen Peroxide.

Used occasionally and diluted with water, Hydrogen peroxide is also used to manage symptoms of itching.

Hydrogen bonding is stronger in non-polar media, so salts, which increase the chemical polarity of the solvent, can also destabilize hydrogen bonding.

Hydrogen embrittlement is also used to describe the formation of zircaloy hydride.