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Descriptor in English: Hydrogen
Descriptor in Spanish: Hidrógeno
Descriptor in Portuguese: Hidrogênio
Descriptor in French: Hydrogène
Entry term(s): Hydrogen 1
Hydrogen-1
Protium
Tree number(s): D01.268.406
D01.362.340
SP4.097.063.904
Scope note: The first chemical element in the periodic table with atomic symbol H, and atomic number 1. Protium (atomic weight 1) is by far the most common hydrogen isotope. Hydrogen also exists as the stable isotope DEUTERIUM (atomic weight 2) and the radioactive isotope TRITIUM (atomic weight 3). Hydrogen forms into a diatomic molecule at room temperature and appears as a highly flammable colorless and odorless gas.
Annotation: H or H1; H2 or 2H (superscript) = DEUTERIUM; H2 (subscript) = HYDROGEN; H3 or 3H = TRITIUM; production of H ions = probably PH
Allowable Qualifiers: AD administration & dosage
AE adverse effects
AG agonists
AN analysis
BL blood
CF cerebrospinal fluid
CH chemistry
CL classification
DF deficiency
EC economics
HI history
IM immunology
IP isolation & purification
ME metabolism
PD pharmacology
PH physiology
PK pharmacokinetics
PO poisoning
RE radiation effects
SD supply & distribution
ST standards
TO toxicity
TU therapeutic use
UR urine
DeCS UI: 7012
Descriptor UI: D006859
Date Established: 1966/01/01
Date of Entry: 1999/01/01
Revision Date: 2019/04/05
Hydrogen - Preferred
Concept UI M0010716
Scope note The first chemical element in the periodic table with atomic symbol H, and atomic number 1. Protium (atomic weight 1) is by far the most common hydrogen isotope. Hydrogen also exists as the stable isotope DEUTERIUM (atomic weight 2) and the radioactive isotope TRITIUM (atomic weight 3). Hydrogen forms into a diatomic molecule at room temperature and appears as a highly flammable colorless and odorless gas.
Preferred term Hydrogen
Entry term(s) Hydrogen 1
Hydrogen-1
Protium



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