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skos:definition |
MSH: 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.,CSP: first chemical element in the periodic table; atomic symbol H, atomic number 1; it exists, under normal conditions, as a colorless, odorless, tasteless, diatomic gas; hydrogen ions are protons.
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