Research any topic before you write.

Find related topics. | Discover entities. | See connections. | Build a topical map.

Fermium

Fermium is a synthetic chemical element; it has symbol Fm and atomic number 100. It is an actinide and the heaviest element that can be formed by neutron bombardment of lighter elements, and hence the last element that can be prepared in macroscopic quantities, although pure fermium metal has not been prepared yet. A total of 20 isotopes are known, with…

Standards, Discovery & Occurrence

Use the mouse wheel or two fingers (on touchscreens) to zoom in and out of the map.

Research this topic

Explore the main themes, entities and connections around Fermium. Start with the topic map, then use the sections below for research and deeper semantic analysis.

Explore this topic

Start with a few of the strongest sections from the source topic. These are research directions, not a list of keywords you must use.

Key facts & relationships

High-confidence facts extracted from structured source data. Use them as anchors for further research.

252Fm
synth
253Fm
synth
255Fm
synth
257Fm
synth
Atomic number (Z)
100
Block
f-block

Topics to explore

Browse the full topic structure. Each item opens a new analysis centered on that subject.

Overview

Discovery

Isotopes

Occurrence

Chemistry

Toxicity

Advanced semantic analysis

Deeper signals for content research, entity SEO and topical coverage. The plain-language headings explain what each technical view is useful for.

Map overview Semantic statistics

Fermium

Nodes73
Edges72
Triples135
Avg. degree1.97
Density0.027397
Components1

How this topic connects Entity context

See the strongest relationship patterns around the current topic before diving into the raw triples.

Fermium

Top relations

related to Further reading · 30
Fermium → Actinide, Anniversary, Chemie, Dordrecht, Edelstein, Elements, Glenn, Hrsg, II, ISBN, January, Jean Fuger, Lawrencium, Lester, Mendelevium, Morss, Nobelium, Norman, Proceedings, Report LBL-7701Gmelins Handbuch
related to Production · 20
Fermium → After, Dowex, Fermium-257, HFIR, However, Hutch, In, July, Lower, MW High Flux Isotope, Oak Ridge, Oak Ridge National Laboratory, Reactor, Smaller, Tennessee, TEVA, The, The Hutch, This, USA
related to Discovery · 12
Fermium → Albert Ghiorso, At, Berkeley, California, December, Element, Initial, It, Ivy Mike, November, They, University
related to Chemistry · 11
Fermium → An3, Fm0, Fm3, FmCl2, II, III, In, It, The, The Fm2, Under
related to Synthesis in nuclear explosions · 10
Fermium → Apart, Enewetak Atoll, For, HFIR, Isolation, Ivy Mike, Nevada Test Site, The, They, Whereas
related to Natural occurrence · 7
Fermium → Because, Earth, Earth's, Oklo, Synthesis, The, Therefore
related to Isotopes · 6
Fermium → All, Because, Other, The, There, This
related to Toxicity · 5
Fermium → Bq, For, International Commission, Radiological Protection, Though
related to External links · 4
Fermium → Nottingham, The Periodic Table, University, Videos
252Fm · 1
Fermium → synth

Important terminology Word statistics

Use these terms to understand the vocabulary surrounding the topic, not as a checklist for keyword stuffing.

Important terminology

isotopes elements half-life nuclear isotope element 100 20 test neutron produced 257fm neutrons new could quantities debris actinides einsteinium capture

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
Fermium252Fmsynth1.00infobox
Fermium253Fmsynth1.00infobox
Fermium255Fmsynth1.00infobox
Fermium257Fmsynth1.00infobox
FermiumAtomic number (Z)1001.00infobox
FermiumBlockf-block1.00infobox
FermiumCAS Number7440-72-41.00infobox
FermiumCrystal structure​face-centered cubic (fcc) (predicted)1.00infobox
FermiumDensity (near r.t.)9.7(1) g/cm3 (predicted)[a]1.00infobox
FermiumDiscoveryLawrence Berkeley National Laboratory (1953)1.00infobox
FermiumElectron configuration[Rn] 5f12 7s21.00infobox
FermiumElectronegativityPauling scale: 1.31.00infobox
FermiumElectrons per shell2, 8, 18, 32, 30, 8, 21.00infobox
FermiumGroupf-block groups (no number)1.00infobox
FermiumIonization energies1st: 629 kJ/mol1.00infobox
FermiumMain isotopes.mw-parser-output .isotopes-table{text-align:center;width:100%;border-collapse:collapse;margin:0;padding:0}.mw-parser-output .isotopes-table-headers>:not(:first-child){padding:0…1.00infobox
FermiumMelting point1800 K ​(1500 °C, ​2800 °F) (predicted)1.00infobox
FermiumNamingafter Enrico Fermi1.00infobox
FermiumNatural occurrencesynthetic1.00infobox
FermiumOxidation statescommon: +3 +21.00infobox
FermiumPeriodperiod 71.00infobox
FermiumPhase .mw-parser-output .nobold{font-weight:normal}at STPsolid (predicted)1.00infobox
FermiumPronunciation/ˈfɜːrmiəm/ ⓘ ​(FUR-mee-əm)1.00infobox
Fermiumis asynthetic chemical element0.90text

Related concept clusters Concept neighborhoods

These clusters group vocabulary that occurs around closely connected concepts in the source material.

    Connections between topic areas Semantic bridges

    Bridges can reveal useful research angles that are easy to miss in a flat list of related terms.

    Min side: 3
    For writers, content strategists, SEOs, marketers and creators — from quick topic research to advanced semantic analysis.