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hydrogen, and the detection of methane (CH,) and ammonia (NHS) offered
support for this reasoning. But direct detection of H, became possible only in
1949, when laboratory work showed the existence of two classes of infrared
Atomic hydrogen also has a rich recombination spectrum in the radio region, as
first predicted in 1959. These lines are ... The electronic states of hydrogen are
described by a quantum number n, which is 1 for the ground state. Lyman alpha,
With the dissociation of the water vapour, many compounds of hydrogen can be
formed; for example, the hydroperoxy radical, HOs, and hydrogen peroxide, H.O.
Furthermore, because the oxides of nitrogen NO and NO, are present, such ...
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This is the 198215th Edition, in two halves, with the Macropaedia and the Micropaedia. First published in 1768, the publisher is the oldest English-language encyclopedia still in print. Two Scottish ... Read full review