NounSingular hydrogen Plural hydrogens hydrogen (plural hydrogens) Wikipedia has an article on: Hydrogen
Derived termsterms derived from hydrogen
Related termsterms related to hydrogen
From Wiktionary under the GNU Free Documentation License. Hydrogen (pronounced /ˈhaɪdrədʒən/) is the chemical element with atomic number 1. It is represented by the symbol H. At standard temperature and pressure, hydrogen is a colorless, odorless, nonmetallic, tasteless, highly flammable diatomic gas with the molecular formula H2. With an atomic weight of 1.00794 u, hydrogen is the lightest element. Hydrogen is the most abundant chemical element, constituting roughly 75% of the universe's elemental mass. Stars in the main sequence are mainly composed of hydrogen in its plasma state. Elemental hydrogen is relatively rare on Earth. Industrial production is from hydrocarbons such as methane with most being used "captively" at the production site. The two largest uses are in fossil fuel processing (e.g., hydrocracking) and ammonia production mostly for the fertilizer market. Hydrogen may be produced from the electrolysis of water or other hydrogen production methods like the reforming of natural gas. The most common isotope of hydrogen is protium (name rarely used, symbol H) with a single proton and no neutrons. In ionic compounds it can take a negative charge (an anion known as a hydride and written as H), or as a positively-charged species H. The latter cation is written as though composed of a bare proton, but in reality, hydrogen cations in ionic compounds always occur as more complex species. Hydrogen forms compounds with most elements and is present in water and most organic compounds. It plays a particularly important role in acid-base chemistry with many reactions exchanging protons between soluble molecules. As the only neutral atom with an analytic solution to the Schrödinger equation, the study of the energetics and bonding of the hydrogen atom played a key role in the development of quantum mechanics. Hydrogen is important in metallurgy as it can embrittle many metals, complicating the design of pipelines and storage tanks. Hydrogen is highly soluble in many rare earth and transition metals and is soluble in both nanocrystalline and amorphous metals. Hydrogen solubility in metals is influenced by local distortions or impurities in the crystal lattice. From Wikipedia under the
GNU Free Documentation License  scientificblogging.com News Account Wed, 09 Apr 2008 20:48:52 GM Chemists are describing development of a revolutionary process for converting plant sugars into . hydrogen. , which could be used to cheaply and efficiently power vehicles equipped with . hydrogen. fuel cells without producing any pollutants ...  artisticthings.com SomewhereBlue Mon, 27 Jul 2009 16:00:43 GM With every concept I see, I get more and more excited about the future of transportation. This is one of the most intelligent green vehicles I have yet to come across. Designed by Santosh Chawla of San Francisco, the Circulus is a ...  dgmarket.com unknown Sat, 25 Jul 2009 23:15:14 GM dgMarket is a portal for tenders, bids, and procurement opportunities worldwide, from governments and development banks. From Google Blog Search: "hydrogen"  news.google.com SustainableBusiness.com Santa Fe, New Mexico-based Jetstream Wind announced plans to build what it says will be the world's first utility-scale, zero-emissions hydrogen power plant ... news.google.com TheGreenCarWebsite.co.uk Carmaker Hyundai and a postgraduate student from Massachusetts Institute of Technology have developed a prototype solar-powered hydrogen car, the Telegraph ... news.google.com Edubourse.com (Communique de presse) Tesoro, a major western United States refiner, will be supplied a total of over 100 MMSCFD (million standard cubic feet per day) of hydrogen for its Golden ... Air Products Signs Contract with Taiwan's CMO to Supply Flat Panel ... PR Newswire (press release) all 12 news articles » From Google News Search: "hydrogen"  minihydrogen.dk 200px x 160px | 17.10kB [source page] every year The target groups are teachers instructors and sometimes also students For these seminars teachers are given a hydrogen drivers license to teach hydrogen and fuel cells  gkllc.com 480px x 503px | 150.50kB [source page] JF 104 Photo of Hydrogen Peroxide Rocket Reaction Control System Ground Test Doc ET 95  hydrogenlabs.com 92px x 200px | 7.50kB [source page] HydrogenPowerUP Hydrogen Fueled GenSet Power Generation coming soon From Yahoo Image Search: "hydrogen" What percentage of hydrogen peroxide should I use to get black stains off of laminate flooring? Q. The floor has black patches from cat urine. I know hydrogen peroxide helps in removing most of the black. But what % would be most effective? Anyone who has had this problem and has got rid of atleast most of the black marks using hydrogen peroxide, I would really appreciate your help! Thanks guys :-) Londonsyard Asked by londonsyard - Tue Aug 18 18:33:02 2009 - - 2 Answers - 0 Comments What is it about the hydrogen atom that allowed it to produce photons of this type? Q. It was determined that not all of the lines in the hydrogen spectrum were visible. There were some discovered in the ultraviolet range A. Hydrogen has an invisible area from which photons outside the visible range originate. B. Only the hydrogen atoms from the sun emit ultraviolet rays. C. Ultraviolet photons have a longer wavelength, thus more energy. D. Higher energy photons come from transitions between energy levels of greater difference in energy. E. This is known as the ultraviolet catastrophe and never really took place. Asked by Dabit G - Sun Jan 20 21:41:31 2008 - - 2 Answers - 0 Comments A. D. is the only one that seems to make _any_sense to me, but it doesn't specifically say why this would be the case for hydrogen, still the other options are worse, so D is my final answer. Answered by tinkertailorcandlestickmaker - Sun Jan 20 21:58:13 2008 What ever happened to hydrogen powered cars?
Q. In 2007 and 2008 there was all this news and now nothing. In know Honda and Chevy where planning on making one and i believe BMW actually made one. Its seems like there focus now is hybrids. I was planning on holding off on buying a new car until they were released but it looks like hydrogen cars aren't coming any time soon. Will hydrogen fuel cell cars ever come? Asked by ROFLsaucer - Fri Jul 31 06:41:14 2009 - - 14 Answers - 0 Comments A. The are not cost effective at this time. Without having most of electricity gennerated by alternative energy, theer really is no point. There is no abundant natural source of hydrogen fuel, It has to be made from natural gas, or by electrolysis using electricity. So for the most part, we use hydrogen like a battery, for energy storage. Half of the electricty in the United States is generated by coal. So, like an electric car, it would be mostly powered by fossil fuels at this time. Answered by hypnobunny - Sat Aug 1 04:24:23 2009 From Yahoo Answer Search: "hydrogen" |
