Chemicals and Drugs

Fermium

A man-made radioactive actinide with atomic symbol Fm, and atomic number 100. Its known isotopes range from 244-254 and 256-258. Its valence can be +2 or +3. Like einsteinium, it was discovered in 1952 in the debris from a thermonuclear explosion.

National Library of MedicineMedical Subject Headings2026

Structured Summary

Abstract

A man-made radioactive actinide with atomic symbol Fm, and atomic number 100. Its known isotopes range from 244-254 and 256-258. Its valence can be +2 or +3. Like einsteinium, it was discovered in 1952 in the debris from a thermonuclear explosion.

Chemical Identity

Chemical Information

Molecular Formula
Fm
Molecular Weight
257.09511 g/mol
CAS Registry No.
7440-72-4
IUPAC Name
fermium
InChIKey
MIORUQGGZCBUGO-UHFFFAOYSA-N
SMILES
[Fm]
MeSH Unique ID
D005286
Source
PubChem CID 23998

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.100w.275w
  2. D01w.268w.556w.266w
  3. D01w.496w.749.305w.100w.275w
  4. D01w.552w.020w.394w
  5. D01w.552w.544w.266w

AMA Style

References

  1. National Library of Medicine. Fermium. Medical Subject Headings (MeSH). 2026. Unique ID D005286. http://id.nlm.nih.gov/mesh/2026/D005286
  2. Fermium. In: Wikipedia. https://en.wikipedia.org/wiki/Fermium
  3. Fermium. In: Wikidata. https://www.wikidata.org/wiki/Q1896
  4. Fermium. In: PubChem Compound. CID 23998. https://pubchem.ncbi.nlm.nih.gov/compound/23998