Noun
- The lightest chemical element (symbol H) with an atomic number of 1 and atomic weight of 1.00794.
- Molecular hydrogen (H2), a colourless, odourless and flammable gas at room temperature.
Read full definition at wiktionary.org
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...Hydrogen (, ) is the chemical element with atomic number 1. It is represented by the symbol H. With an atomic weight of , hydrogen is the lightest element. Read full entry
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- 1.Hydrogen - Wikipedia, the free encyclopedia
- Includes an article with pictures covering properties, applications, history, forms and safety precautions. ... This article is about the chemistry of hydrogen. ...
- http://en.wikipedia.org/wiki/H
ydrogen
- 2.Hydrogen
- Explains where hydrogen comes from, how it is used, and its potential for new energy applications. ... Hydrogen is estimated to make up more than 90% of all ...
- http://periodic.lanl.gov/eleme
nts/1.html
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hydrogen???????????????
Helium and hydrogen???
in the early 1900s hydrogen
gas was used to inflate
airships after on large ship
crashed and caught on fire teh
helium gas began to be used to
inflate air ships .why was
helium preffered over oxygen?
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Oxygen isn't "lighter than air". |
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How is hydrogen peroxide bad My ear got infected and was
oozing bloody puss a few days
ago. My mom put Hydrogen
Peroxide and Neosporin on it
and it hasn't pussed or
anything since, however, it
still feels swollen and it's
hard to/hurts to twist the ear
ring. I got on here to look
for answers and kept reading
the hydrogen peroxide is bad
for it, which brings me to my
original question. How is
hydrogen peroxide bad for
infected ear piercings and
what are alternative methods?
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yeah i've heard hydrogen peroxide dries it and take longer to heal. it's better than nothing though. if you got it pierced professionally, they should give something to clean your ear with, but if not then mix sea salt and water and apply it with a q-tip. also keep twisting it. and i heard vaseline is good for piercings because it keeps stuff out of the piercing, like bacteria, but i haven't actually tried it. hope that helps |
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What happens to hydrogen in I know that hydrogen is
adsorbed onto the surface of
platinum, but is it still
molecular hydrogen (H2), or
does it break up into hydrogen
atoms (H
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Great Q. H2 adsorbs on the surface of Pt, then dissociates into H atoms which bond to surface Pt atoms but can skate around from one site to another. The alkene is also chemically adsorbed onto the Pt surface, using its pi-electrons. We then have the reactions Surface H + C2H4 --> surface C2H5 Surface C2H5 + surface H --> Gaseous C2H6 The reaction is not so much of free radical reaction, as the addition of "Pt-H" across the double bond (compare the addition of H-Br) In solution, H2 bubbled over finely divided Pt gives the famous "platinum electrode", which catalyses redox equilibria involving H2 and H+: H2 <==> 2 surface H surface H + H2O <==> H3O+ + e- on Pt This electron can be transferred to reducible species in solution, or supplied to a second electrode in an electrochemical cell. |
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