Chemicals and Drugs

Francium

A radioactive alkali metal with the atomic symbol Fr, and atomic number 87. The mass numbers of known isotopes are 204-213, 217-224. Its valence is +1.

National Library of MedicineMedical Subject Headings2026

Structured Summary

Abstract

A radioactive alkali metal with the atomic symbol Fr, and atomic number 87. The mass numbers of known isotopes are 204-213, 217-224. Its valence is +1.

Chemical Identity

Chemical Information

Molecular Formula
Fr
Molecular Weight
223.01973 g/mol
CAS Registry No.
7440-73-5
IUPAC Name
francium
InChIKey
KLMCZVJOEAUDNE-UHFFFAOYSA-N
SMILES
[Fr]
MeSH Unique ID
D005605
Source
PubChem CID 6328145

MeSH Record

Classification

Broader headings

Related Concepts

Knowledge Graph

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MeSH Record

Aspects Covered

19 allowable subheadings

Indexed with the subheadings administration & dosage, adverse effects, analysis, blood, cerebrospinal fluid, chemistry, classification, economics, history, isolation & purification, metabolism, pharmacokinetics, pharmacology, poisoning, standards, supply & distribution, therapeutic use, toxicity, urine.

MeSH Hierarchy

Tree Numbers

  1. D01w.268w.271w.380w
  2. D01w.268w.549w.250w
  3. D01w.268w.556w.277w
  4. D01w.496w.749.305w.380w
  5. D01w.552w.528w.328w
  6. D01w.552w.544w.277w

AMA Style

References

  1. National Library of Medicine. Francium. Medical Subject Headings (MeSH). 2026. Unique ID D005605. http://id.nlm.nih.gov/mesh/2026/D005605
  2. Francium. In: Wikipedia. https://en.wikipedia.org/wiki/Francium
  3. Francium. In: Wikidata. https://www.wikidata.org/wiki/Q671
  4. Francium. In: PubChem Compound. CID 6328145. https://pubchem.ncbi.nlm.nih.gov/compound/6328145