calcium hydride

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Noun1.calcium hydride - a saltlike binary compound (CaH2) used as a reducing agent and source of hydrogen
hydride - any binary compound formed by the union of hydrogen and other elements
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For instance, the calcium hydride molecular ion (made of one calcium ion and one hydrogen ion bonded together) used by NIST in their experiments has 100 possible rotational states.
In this regard, the generation of Ca II emission lines from analogous condensations of calcium hydride, involves the transfer of two electrons per hydrogen atom [18].