hydrogen atom

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The present importance of hydrogen in chemistry is related, however, not to its separate atomic nature, nor even to its incorporation in innumerable chemical compounds of diverse nature; to the contrary, the presumed importance lies in a gratuitous assumption and expectation that the calculated properties of atomic hydrogen, with Z = 1, might somehow be directly pertinent to both atoms of other elements, with Z > 1, and molecules or materials containing those elements--virtually Prout's hypothesis.
However, hydrogen embrittlement should follow Sievert's law and will be influenced by the concentration of atomic hydrogen absorbed in the metal.
The mechanism of cracking is explained by development of internal pressure on the assumption that interstitial atomic hydrogen is released as molecular hydrogen at voids or other sites under extreme pressure that results in formation of visible blisters associated with HIC specially seen in ductile metals that are cathodically polarized.
In the case of atomic hydrogen, the catalyst atoms must accept a specific (resonant) amount of energy from the hydrogen atom.
Several other PhD candidates used the equipment and process to study reactions of atomic hydrogen with other free radicals so this turned out to be a very worthwhile contribution.
Hydrogen solution may result from the dissociation of moisture in the atmosphere, which allows atomic hydrogen diffusion into the melt.
Examples of welding processes and technologies analysed within the report include: arc, MIG, TIG, plasma-arc, shielded metal arc-welding, submerged arc-welding, carbon arc-welding, electro-slag, radiant energy, laser, electron beam, atomic hydrogen, solid state, ultrasonic, cold and diffusion.
Out of that cloud condensed the first stars and galaxies, and when they began emitting ionizing radiation and light, the atomic hydrogen cleared away and light spread through the universe.
The study will look at the formation of H2 in excited states starting from the interaction between a gas of atomic hydrogen and hydride ions its diffusion in the material and the in situ formation of excited molecular states of H2 in specific storage materials.
While previous studies have observed tunneling of atomic hydrogen in other systems, the ORNL discovery that water exhibits such tunneling behavior is unprecedented.
A cyclic pathway has been created, wherein triplet hydrogen is preserved and continuously working to assist in the resynthesis of condensed hydrogen structures, as the Sun recaptures any atomic hydrogen lost to its atmosphere.
Astronomers are able to observe neutral atomic hydrogen, which is referred to as HI (H and the Roman numeral one), because of the characteristic signal it emits at radio wavelengths, which can be detected by radio telescopes on Earth.
Among the topics he discusses are why to record the spectra of astronomical objects, atomic hydrogen, helium spectra, alkali atoms, spectra in magnetic fields, molecular structure, rotational spectra, and the electronic spectra of diatomic molecules.
BURST VERSUS QUASAR Researchers have already recorded the telltale gap caused by atomic hydrogen in the spectrum of another type of bright beacon, known as a quasar (SN: 8/11/01,p.
Radio emission from atomic hydrogen in more distant clouds shines through hydrogen in foreground clouds.