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 hydrogen - Definition 

Hydrogen-7 (882 bytes)
1: ...tion, the helium-8's neutrons were donated to the hydrogen. The two remaining protons were detected by the [...
5: <td width = 30% align = center>'''[[Hydrogen-5]]'''</td>
6: ...d width = 40% align = center>'''[[Isotope]]s of [[Hydrogen]]'''</td>

Hydrogen-6 (133 bytes)
1: ...t it would be possible by bombing Hydrogen-4 with Hydrogen-3 (tritium).

Hydrogen-4 (926 bytes)
1: ...ast-moving deuterium nucleus. The presence of the hydrogen-4 was deduced by detecting the emitted protons.
5: <td width = 30% align = center>'''[[Hydrogen-3]]'''
6: ...d width = 40% align = center>'''[[Isotope]]s of [[Hydrogen]]'''
7: <td width = 30% align = center>'''[[Hydrogen-5]]'''
11: <td width = 30% align = center>Decays to:<br>'''[[Hydrogen-3]]'''

Hydrogen (19562 bytes)
5: <tr><td colspan="2" align="center">'''hydrogen''' &ndash; [[helium]]</td>
15: ...]], [[List of elements by number|Number]]</td><td>Hydrogen, H, 1 </td></tr>
85: <td>[[Hydrogen-4|<sup>4</sup>H]]</td><td>{syn.}</td><td>unknown<...
87: <td>[[Hydrogen-5|<sup>5</sup>H]]</td><td>{syn.}</td><td>unknown<...
89: <td>[[Hydrogen-7|<sup>7</sup>H]]</td><td>{syn.}</td><td>unknown<...

Hydrogen-5 (960 bytes)
1: ...ning proton may be detected, and the existence of hydrogen-5 deduced.
5: <td width = 30% align = center>'''[[Hydrogen-4]]'''
6: ...d width = 40% align = center>'''[[Isotope]]s of [[Hydrogen]]'''
7: <td width = 30% align = center>'''[[Hydrogen-7]]'''
11: <td width = 30% align = center>Decays to:<br>'''[[Hydrogen-4]]'''

Hydrogen hypothesis (136 bytes)
1: The '''Hydrogen hypothesis''' is a model that describes how the f...

Hydrogen Jukebox (311 bytes)
1: '''Hydrogen Jukebox''' is musical theatrical collaboration fe...

Hydrogen Economy (2211 bytes)
1: The '''Hydrogen Economy''' is a hypothetical model for replacing ...
3: ...if nuclear of fossil fuels are used to create the hydrogen then the environmental issues associated with tho...
5: ...h efficiency generators or fuel cells that run on hydrogen could replace electrical distribution systems. Si...
7: ...tem would be where solar power is used to produce hydrogen from water and then a fuel cell is used to produc...
9: ...may be offset by energy losses when converting to hydrogen.

Hydrogen embrittlement (1077 bytes)
1: ...t''', is not completely understood. Detection of hydrogen embrittlement in welds and fabricated parts is mo...
3: ...e metal. In steel (an alloy of iron and carbon), hydrogen will diffuse along grain boundaries and combine w...
7: ...removing the ambient hydrogen source to cause the hydrogen within the metal to diffuse out and restore ducti...

Hydrogen fuel (3062 bytes)
2: The element '''hydrogen''' may be used as fuel in several ways.
4: ==[[Hydrogen]] is the simplest element.==
5: ...e, is a combination of hydrogen and oxygen (H2O). Hydrogen is also found in many organic compounds, notably ...
7: ...nder certain conditions. Another process creating hydrogen is the placement of diluted acids on aluminium or...
9: ...l the space shuttle and other rockets into orbit. Hydrogen fuel cells ([[PEMFC]]) power the shuttle's electr...

Molecular hydrogen (111 bytes)
1: ... is a [[molecule]] formed from two [[atom]]s of [[hydrogen]].

Hydrogen economy (16453 bytes)
1: ...] for mobile applications and load balancing is [[hydrogen]].
7: ... produce that electricity. A massive increase in hydrogen production (via electrolysis) will only happen if...
9: Production of hydrogen from hydrocarbons (or just carbon, i.e. coal) is ...
25: ... Others are working on direct solar production of hydrogen through cyanobacteria or organometallic substrate...
27: ... electricity demand lags solar production &mdash; hydrogen produced in the mid morning (a time of high produ...

Hydrogen sulfide (4822 bytes)
15: <td>Hydrogen sulfide</td>
18: <td>[[hydrogen|H]]<sub>2</sub>[[sulfur|S]]</td>
95: ...ssociated with other decay smells in [[swamp]]s. Hydrogen sulfide is produced by the breakdown of [[sulfur]...
97: Hydrogen sulfide occurs naturally in [[crude petroleum]], ...
99: Hydrogen sulfide can also result from industrial activitie...

Metallic hydrogen (5769 bytes)
1: ... is an example of [[degenerate matter]]. Metallic hydrogen consists of a lattice of [[atomic nucleus|atomic ...
4: ...gner]] predicted that under immense [[pressure]], hydrogen [[atom]]s would indeed join their first period ki...
6: ...atmosphere]]s - the first identifiably metallic [[hydrogen]], ending the 60-year search.
8: ...; furthermore, in previous studies in which solid hydrogen was compressed inside [[diamond anvil]]s to press...
10: ...ner at up to 8 km/s (18,000 mph), compressing the hydrogen inside.

Hydrogen cyanide (5259 bytes)
13: <td>Hydrogen cyanide</td>
25: ...rogen_cyanide_structure.png|Chemical structure of hydrogen cyanide]]
100: ...ypical a hydrogen cyanide odor. The [[salt]]s of hydrogen cyanide are known as [[cyanide]]s.
102: Hydrogen cyanide is produced in large quantities all over ...
104: ...flavoring is made, also contain hydrogen cyanide. Hydrogen cyanide is contained in the exhaust of vehicles, ...

Hydrogen atom (9457 bytes)
1: ...]] which is the [[Atomic nucleus|nucleus]] of the hydrogen atom. The electron is bound to the proton by the ...
3: ...tally observed frequencies and intensities of the hydrogen [[spectral line]]s can be calculated.
5: ...ohr]] had deduced the spectral frequencies of the hydrogen atom making several assumptions (see [[The Bohr M...
9: The solution of the Schrödinger equation for the hydrogen atom uses the fact that the [[Coulomb potential]]...
15: ...th [[rotational symmetry]]). In addition, for the hydrogen atom, the states of the same n are also [[degener...

Hydrogen peroxide (12762 bytes)
15: <td>Hydrogen peroxide</td>
18: <td>[[hydrogen|H]]<sub>2</sub>[[oxygen|O]]<sub>2</sub></td>
97: ...ethods have become important in the production of hydrogen peroxide. These include (1) the autoxidation of h...
100: ...ssue. However, recent studies have indicated that hydrogen peroxide is toxic to new cells and is therefore n...
104: ...er Society, "there is no scientific evidence that hydrogen peroxide is a safe, effective or useful cancer tr...

Hydrogen bond (6183 bytes)
1: ...ronger than most other intermolecular forces, the hydrogen bond is much weaker than both the [[ionic bond]] ...
3: ...of the bond involves a [[hydrogen]] [[atom]]. The hydrogen must be attached to a strongly [[electronegative]...
4: ...lectrons on another heteroatom, which becomes the hydrogen-bond ''acceptor''.
6: ...ency tends to be more extreme when acceptors bind hydrogens from more electronegative donors.
8: ...ation of donor and acceptor, the retention of the hydrogen nucleus (or [[proton]]) would cause no increase i...

Hydrogen carrier (411 bytes)
1: ... [[macromolecule]] that transports [[atom]]s of [[hydrogen]] from one place to another inside a cell or from...

Hydrogen reformer (2470 bytes)
1: ...rogen reformer''' is a device that extracts the [[hydrogen]] contained in other [[fuel]]s. A reformer allows...
3: ...[catalyst|catalytic]] reaction that separates the hydrogen from the [[carbon]] in the fuel, then mixes the c...
11: ...will always be financially advantageous over pure hydrogen, which is expensive to separate, bulky, and diffi...

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This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "hydrogen".