Structured Summary
Abstract
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.
MeSH Record
Classification
Related Concepts
Knowledge Graph
Drag nodes to rearrange; hover to trace links; click a node to open its page.
MeSH Record
Synonyms
2 entry terms
- Hydrogen-1
- Protium
MeSH Record
Aspects Covered
24 allowable subheadings
Indexed with the subheadings administration & dosage, adverse effects, agonists, analysis, blood, cerebrospinal fluid, chemistry, classification, deficiency, economics, history, immunology, isolation & purification, metabolism, pharmacokinetics, pharmacology, physiology, poisoning, radiation effects, standards, supply & distribution, therapeutic use, toxicity, urine.
MeSH Record
Indexing Annotation
H or H1; H2 or 2H (superscript) = DEUTERIUM; H2 (subscript) = HYDROGEN; H3 or 3H = TRITIUM; production of H ions = probably PH
MeSH Hierarchy
Tree Numbers
AMA Style
References
- National Library of Medicine. Hydrogen. Medical Subject Headings (MeSH). 2026. Unique ID D006859. http://id.nlm.nih.gov/mesh/2026/D006859
- Hydrogen. In: Wikipedia. https://en.wikipedia.org/wiki/Hydrogen
- Hydrogen. In: Wikidata. https://www.wikidata.org/wiki/Q556