Preferred Label : hydrogen;
RADLEX synonyms : H;
Definition : Hydrogen. The first chemical element in the periodic table. It has the atomic symbol
H, atomic number 1, and atomic weight 1. 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. [MeSH];
UMLS CUI (RADLEX) : C0020275;
Origin ID : RID11762;
UMLS CUI : C0020275;
Automatic exact mappings (from CISMeF team)
- Semantic type(s)
- UMLS correspondences (same concept)
Hydrogen. The first chemical element in the periodic table. It has the atomic symbol
H, atomic number 1, and atomic weight 1. 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. [MeSH]
