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Hydrogen

"Hydrogen" is a descriptor in the National Library of Medicine's controlled vocabulary thesaurus, MeSH (Medical Subject Headings). Descriptors are arranged in a hierarchical structure, which enables searching at various levels of specificity.

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The first chemical element in the periodic table. It has the atomic symbol H, atomic number 1, and atomic weight [1.00784; 1.00811]. It exists, under normal conditions, as a colorless, odorless, tasteless, diatomic gas. Hydrogen ions are PROTONS. Besides the common H1 isotope, hydrogen exists as the stable isotope DEUTERIUM and the unstable, radioactive isotope TRITIUM.


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This graph shows the total number of publications written about "Hydrogen" by people in this website by year, and whether "Hydrogen" was a major or minor topic of these publications.
Bar chart showing 25 publications over 13 distinct years, with a maximum of 5 publications in 2012
To see the data from this visualization as text, click here.