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Technetium: Characters, History, Applications & Standards

Technetium is a chemical element; it has symbol Tc and atomic number 43. It is the lightest element whose isotopes are all radioactive. Technetium is one of only two radioactive elements both preceded and succeeded in the periodic table by elements with stable forms, the other being promethium. All available technetium is produced as a synthetic element.…

Language: English [EN]
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Technetium topic overview

The analysis highlights Characters, History, Applications and Standards as prominent areas in the source structure around Technetium.

Related topics
246
Source areas
8
Connected nodes
254
Extracted relationships
240
Concept neighborhoods
64
Bridge connections
254

What this topic covers Research coverage

Source areas are shown by the number of related topics found in each part of the analysis. Use smaller areas too: they can reveal specialized angles and content gaps.

Occurrence and production · 56 topics
History · 46 topics
Compounds · 36 topics
Overview · 34 topics
Characteristics · 29 topics
Applications · 25 topics
Isotopes · 17 topics
Precautions and biological effect · 3 topics

Smaller areas are not necessarily less important. They contain fewer connections in this analysis and can be useful for finding specialized angles or coverage gaps.

Key facts & relationships

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

95mTc
synth
96Tc
synth
97mTc
synth
97Tc
synth
98Tc
synth
99mTc
synth

Explore all related topics Closing gaps

Browse the complete topic structure, not only the most central items. Less prominent entities and concepts can reveal missing angles, specialized context and useful research gaps. Each item opens a new analysis centered on that subject.

Overview

History

Characteristics

Compounds

Isotopes

Occurrence and production

Applications

Precautions and biological effect

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.

How Technetium connects Entity context

The extracted context around Technetium shows recurring relationship patterns in the source. For example, Technetium → Berkeley, California, Carlo Perrier, Columbia University, Emilio Segrè, Ernest Lawrence, Glenn, Greek, He, In, Latin, Lawrence, Lawrence Berkeley National Laboratory, New York, Palermo, Panormus, Perrier, Seaborg, Segrè, Sicily Another extracted example is Technetium → German, Henry Moseley, Ida Tacke, Later, Masuria, Nazis, Noddacks, Otto Berg, Paul Kuroda's, Poland, Prussia, Russian, Some, Still, The, This, Walter Noddack, Walter Noddack's, World War, X-ray. Use these groups to spot repeated connection types before inspecting the individual relationships.

Technetium

Top relations

related to history · 24
Technetium → Berkeley, California, Carlo Perrier, Columbia University, Emilio Segrè, Ernest Lawrence, Glenn, Greek, He, In, Latin, Lawrence, Lawrence Berkeley National Laboratory, New York, Palermo, Panormus, Perrier, Seaborg, Segrè, Sicily
related to Irreproducible results · 21
Technetium → German, Henry Moseley, Ida Tacke, Later, Masuria, Nazis, Noddacks, Otto Berg, Paul Kuroda's, Poland, Prussia, Russian, Some, Still, The, This, Walter Noddack, Walter Noddack's, World War, X-ray
related to Fission product · 18
Technetium → An, Bq/kg, Cumbria, Discharge, European, For, From, In, Irish Sea, It, Its, Only, Other, Reprocessing, Sellafield, TBq, Technetium-99, The
related to Simple hydride and halide complexes · 17
Technetium → At, II, ReH2, Tc, TcBr3, TcBr4, TcCl2, TcCl3, TcCl4, TcF5, TcF6, TcH1, TcH2, TcI3, The, These, VI
related to Industrial and chemical · 11
Technetium → For, However, In, It, Like, Moreover, National Institute, NIST, Standards, Technetium-99, Technology
related to Coordination and organometallic complexes · 10
Technetium → CO, H2O, In, Interest, Many, Prominent, Similar, Tc, Tc2, The
related to Waste disposal · 9
Technetium → An, By, CERN, Current, Hence, If, In, Many, The
related to Chemical properties · 8
Technetium → As, Metallic, Of, Tc6C, TcH1, This, Unlike, When
related to Other chalcogenide derivatives · 8
Technetium → An, However, It, Similarly, Tc2O7, Tc2S7, TcO3, Unlike
related to Pertechnetate and other derivatives · 7
Technetium → MnO, Na, Pertechnetate, TcO, TcO4, The, Unlike

Important terminology

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

Important terminology

element technetium-99 nuclear radioactive produced technetium-99m metal isotopes pertechnetate fission half-life tc used isotope one two elements table uranium molybdenum

Technetium relationships Subject–Predicate–Object triples

TTTA extracted 240 structured relationships around Technetium. Examples in this analysis include Technetium → 95mTc → synth and Technetium → 99Tc → trace. The table shows each extracted connection, where it came from and its confidence.

SubjectPredicateObjectConfidenceSrc
Technetium95mTcsynth1.00infobox
Technetium96Tcsynth1.00infobox
Technetium97mTcsynth1.00infobox
Technetium97Tcsynth1.00infobox
Technetium98Tcsynth1.00infobox
Technetium99mTcsynth1.00infobox
Technetium99Tctrace1.00infobox
TechnetiumAppearanceshiny gray metal1.00infobox
Technetiumat T (K)27271.00infobox
TechnetiumAtomic number (Z)431.00infobox
TechnetiumAtomic radiusempirical: 136 pm1.00infobox
TechnetiumBlockd-block1.00infobox
TechnetiumBoiling point4538 K ​(4265 °C, ​7709 °F)1.00infobox
TechnetiumCAS Number7440-26-81.00infobox
TechnetiumCovalent radius147±7 pm1.00infobox
TechnetiumCrystal structure​hexagonal close-packed (hcp) (hP2)1.00infobox
TechnetiumDensity (at 20° C)98Tc: 11.359 g/cm3 99Tc: 11.475 g/cm31.00infobox
TechnetiumDiscovery and first isolationCarlo Perrier and Emilio Segrè (1937)1.00infobox
TechnetiumElectrical resistivity200 nΩ⋅m (at 20 °C)1.00infobox
TechnetiumElectron configuration[Kr] 4d5 5s21.00infobox
TechnetiumElectronegativityPauling scale: 1.91.00infobox
TechnetiumElectrons per shell2, 8, 18, 13, 21.00infobox
TechnetiumGroupgroup 71.00infobox
TechnetiumHeat of fusion33.29 kJ/mol1.00infobox
TechnetiumHeat of vaporization585.2 kJ/mol1.00infobox
TechnetiumIonization energies1st: 686.9 kJ/mol1.00infobox
TechnetiumIonization energies2nd: 1470 kJ/mol1.00infobox
TechnetiumIonization energies3rd: 2850 kJ/mol1.00infobox
TechnetiumLattice constantsa = 274.12 pm c = 439.90 pm (at 20 °C)1.00infobox
TechnetiumMagnetic orderingParamagnetic1.00infobox

Related concept clusters Concept neighborhoods

The concept neighborhoods around Technetium bring nearby vocabulary together. In this analysis, examples include Form, Fission and Forms. Use the clusters to find adjacent concepts and terminology that may deserve separate research.

  • Technetium
    • Form
    • Fission
    • Forms
    • Two
    • Produced
    • Nuclear
    • Radioactive
    • Rhenium
    • Isotope
    • Half-life
    • Metal
    • Pertechnetate
  • technetium
    • Form
    • Fission
    • Forms
    • Two
    • Produced
    • Nuclear
    • Radioactive
    • Rhenium
    • Isotope
    • Half-life
    • Metal
    • Pertechnetate
  • chemical element
    • Manganese
    • Rhenium
    • Periodic
    • Atomic
    • Two
    • Produced
    • Discovery
    • Table
    • Metal
    • High
    • Element
    • Isotopes
  • atomic number
    • Element
    • Isotopes
    • Molybdenum
    • Chemical
    • Periodic
    • Table
    • Tc
    • Radioactive
    • Produced
    • Common
    • Discovery
    • Technetium
  • isotopes
    • Decay
    • Fission
    • Radioactive
    • Molybdenum
    • Years
    • Periodic
    • Table
    • Produced
    • Stable
    • Technetium
    • Nuclear
    • Isotope
  • radioactive
    • Half-life
    • Periodic
    • Table
    • Stable
    • Isotope
    • Technetium
    • Used
    • Technetium-99m
    • Nuclear
    • Corrosion
    • Fuel
    • Years
  • synthetic element
    • Atomic
    • Produced
    • Discovery
    • Periodic
    • Table
    • Manganese
    • Isotopes
    • Radioactive
    • Technetium
    • Molybdenum
    • Tc
    • Nuclear
  • fission product
    • Nuclear
    • Produced
    • Technetium-99
    • Uranium
    • Common
    • Fuel
    • Reactors
    • Isotope
    • Isotopes
    • Technetium
    • Molybdenum
    • Tc

Connections between topic areas Semantic bridges

For Technetium, one of the stronger structural bridges in this analysis connects Technetium with Occurrence and production. Bridges highlight paths between different parts of the map and can reveal research angles that are easy to miss in a flat list.

Min side: 3
TechnetiumOccurrence and production · splits 198 ⟂ 57
TechnetiumHistory · splits 208 ⟂ 47
TechnetiumCompounds · splits 218 ⟂ 37
TechnetiumOverview · splits 220 ⟂ 35
TechnetiumCharacteristics · splits 225 ⟂ 30
TechnetiumApplications · splits 229 ⟂ 26
TechnetiumIsotopes · splits 237 ⟂ 18
TechnetiumPrecautions and biological effect · splits 251 ⟂ 4

Map overview Semantic statistics

Technetium

Nodes255
Edges254
Triples240
Avg. degree1.99
Density0.007843
Components1

Source & methodology

TTTA analyzes the structure around Technetium to surface related topics, entities, relationships, concept neighborhoods and bridge connections. Use the map to explore areas such as Characters, History, Applications & Standards, including less central topics that may reveal useful research gaps. Automatically extracted connections are research leads rather than rewritten encyclopedia content.

Source: Wikipedia — Technetium · EN edition · Analysis: TopicsToTalkAbout

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