Research any topic before you write.

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

Lead: History & Applications

Lead (/lɛd/ ⓘ) is a chemical element with the symbol Pb (from the Latin plumbum) and atomic number 82. It is a heavy metal, denser than most common materials. Lead is soft, malleable, and has a relatively low melting point. When freshly cut or melted, it appears shiny silvery with a bluish tint, but tarnishes to dull gray on exposure to air. Lead has the…

Language: English [EN]
Use the mouse wheel or two fingers (on touchscreens) to zoom in and out of the map.
100%
More settings
100% 100% 100% 100% 100%

Lead topic overview

The analysis highlights History and Applications as prominent areas in the source structure around Lead.

Related topics
368
Source areas
11
Connected nodes
385
Extracted relationships
375
Concept neighborhoods
68
Bridge connections
385

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.

Overview · 124 topics
Physical properties · 56 topics
Biological effects · 48 topics
Applications · 46 topics
Chemistry · 30 topics
Origin and occurrence · 21 topics
Restriction and remediation · 18 topics
Environmental effects · 11 topics
Production · 7 topics
Etymology · 6 topics
History · 1 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.

202Pb
synth
204Pb
1.40%
205Pb
synth
206Pb
24.1%
207Pb
22.1%
208Pb
52.4%

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

Physical properties

Chemistry

Origin and occurrence

Etymology

History

Production

Applications

Biological effects

Environmental effects

Restriction and remediation

Bibliography

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 Lead connects Entity context

The extracted context around Lead shows recurring relationship patterns in the source. For example, Lead → Abraham, Analytical Aspects, Assessing, Astrid, Berry, Bibcode, Biology, Chen, De Gruyter, DNA, Elsevier, Environment, Environmental Health Perspectives, Environmental Impacts, Hao, Health, Health Effects, Helmut, Hunt, Ingalls Another extracted example is Lead → American, Atmospheric, By, Canadian, Chronic, Continual, Earth's, Elevated, Global South, In, Industrial Revolution, It, Its, IX, Only, Several, Small, Symptoms, The, This. Use these groups to spot repeated connection types before inspecting the individual relationships.

Lead

Top relations

related to Further reading · 49
Lead → Abraham, Analytical Aspects, Assessing, Astrid, Berry, Bibcode, Biology, Chen, De Gruyter, DNA, Elsevier, Environment, Environmental Health Perspectives, Environmental Impacts, Hao, Health, Health Effects, Helmut, Hunt, Ingalls
has effect · 20
Lead → American, Atmospheric, By, Canadian, Chronic, Continual, Earth's, Elevated, Global South, In, Industrial Revolution, It, Its, IX, Only, Several, Small, Symptoms, The, This
related to Etymology · 17
Lead → According, Another, English, German Blei, Germanic, Latin, Middle English, Old English, One, Pb, Proto-Celtic, Proto-Germanic, Proto-Indo-European, The, The Old English, There, This
related to Restriction and remediation · 17
Lead → Avgas, By, Chinese, Congress, Environmental Protection Agency, EU, European Union's, Hazardous Substances Directive, In, Netherlands, Old, Particulate, Restriction, Stripping, The, United States, White
related to Production · 16
Lead → According, As, Australia, China, Given, In, India, Metal Stocks, Much, Scrap, Secondary, Society, Some, The, There, United States
related to Compounds · 15
Lead → Because, China, Europe, European, In, India, Indonesia, It, Lead-based, North America, North American, Other, The, TVs, While
related to Organolead · 15
Lead → CH, For, II, Its, IV, Other, Pb, Plumbane, SiMe3, Tetraethyllead, The, These, This, Two, With
related to On Earth · 12
Lead → Arsenic, Earth's, Goldschmidt, It, Many, Most, Pb5Sb4S11, PbCO3, PbS, PbSO4, The, This
related to Bibliography · 11
Lead → CC-BY-SA-3, ISSN, July, Mikhail Boldyrev, PDF, Science, The, This, Wikidata Q56050531, WikiJournal, Wikipedia
related to Disease burden · 11
Lead → American College, Cardiology, CVD, CVDs, Disease Study, Half, IQ, Journal, Lancet Planetary Health, The, The Global Burden

Important terminology

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

Important terminology

used high compounds exposure may use ii stable production metal density levels oxidation states atomic isotopes metals copper two number

Lead relationships Subject–Predicate–Object triples

TTTA extracted 375 structured relationships around Lead. Examples in this analysis include Lead → 202Pb → synth and Lead → 204Pb → 1.40%. The table shows each extracted connection, where it came from and its confidence.

SubjectPredicateObjectConfidenceSrc
Lead202Pbsynth1.00infobox
Lead204Pb1.40%1.00infobox
Lead205Pbsynth1.00infobox
Lead206Pb24.1%1.00infobox
Lead207Pb22.1%1.00infobox
Lead208Pb52.4%1.00infobox
Lead209Pbtrace1.00infobox
Lead210Pbtrace1.00infobox
Lead211Pbtrace1.00infobox
Lead212Pbtrace1.00infobox
Lead214Pbtrace1.00infobox
LeadAppearancemetallic gray1.00infobox
Leadat T (K)9781.00infobox
LeadAtomic number (Z)821.00infobox
LeadAtomic radiusempirical: 175 pm1.00infobox
LeadBlockp-block1.00infobox
LeadBoiling point2022 K ​(1749 °C, ​3180 °F)1.00infobox
LeadBrinell hardness38–50 MPa1.00infobox
LeadBulk modulus46 GPa1.00infobox
LeadCAS Number7439-92-11.00infobox
LeadCovalent radius146±5 pm1.00infobox
LeadCrystal structure​face-centered cubic (fcc) (cF4)1.00infobox
LeadDensity (at 20 °C)11.348 g/cm31.00infobox
LeadDiscoveryMiddle East (7000 BCE)1.00infobox
LeadElectrical resistivity208 nΩ⋅m (at 20 °C)1.00infobox
LeadElectron configuration[Xe] 4f14 5d10 6s2 6p21.00infobox
LeadElectronegativityPauling scale: 2.33 (in +4), 1.87 (in +2)1.00infobox
LeadElectrons per shell2, 8, 18, 32, 18, 41.00infobox
LeadGroupgroup 14 (carbon group)1.00infobox
LeadHeat of fusion4.77 kJ/mol1.00infobox

Related concept clusters Concept neighborhoods

The concept neighborhoods around Lead bring nearby vocabulary together. In this analysis, examples include Ii, Used and Compounds. Use the clusters to find adjacent concepts and terminology that may deserve separate research.

  • Lead
    • Ii
    • Used
    • Compounds
    • May
    • High
    • Use
    • Exposure
    • Water
    • Production
    • Metal
    • Levels
    • Metals
  • lead
    • Ii
    • Used
    • Compounds
    • May
    • High
    • Use
    • Exposure
    • Water
    • Production
    • Metal
    • Levels
    • Metals
  • atomic number
    • Number
    • Isotopes
    • High
    • Stable
    • Density
    • Lead's
    • Relatively
    • Decay
    • Metallic
    • Zinc
    • Common
    • Copper
  • isotopes
    • Decay
    • Stable
    • Number
    • Lead's
    • High
    • Calcium
    • Organolead
    • Tin
    • Carbon
    • Gold
    • Relatively
    • Silver
  • lead oxides
    • Ii
    • Used
    • Compounds
    • May
    • High
    • Use
    • Exposure
    • Water
    • Production
    • Metal
    • Levels
    • Metals
  • lead compounds
    • Organolead
    • Carbon
    • Oxidation
    • States
    • Ii
    • Exposure
    • Less
    • Stable
    • Used
    • Compounds
    • Lead
    • May
  • carbon group
    • Organolead
    • Tin
    • Common
    • Oxidation
    • Compounds
    • Less
    • Ii
    • Calcium
    • Gold
    • Silver
    • Batteries
    • Metallic
  • organolead compounds
    • Organolead
    • Oxidation
    • Less
    • Carbon
    • Stable
    • States
    • Ii
    • Exposure
    • Lead
    • Relatively
    • Batteries
    • Metallic

Connections between topic areas Semantic bridges

For Lead, one of the stronger structural bridges in this analysis connects Lead with Overview. 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
Lead — Overview · splits 261 ⟂ 125
Lead — Physical properties · splits 329 ⟂ 57
Lead — Biological effects · splits 337 ⟂ 49
Lead — Applications · splits 339 ⟂ 47
Lead — Chemistry · splits 355 ⟂ 31
Lead — Origin and occurrence · splits 364 ⟂ 22
Lead — Restriction and remediation · splits 367 ⟂ 19
Lead — Environmental effects · splits 374 ⟂ 12
Lead — Production · splits 378 ⟂ 8
Lead — Etymology · splits 379 ⟂ 7
Lead — Bibliography · splits 380 ⟂ 6

Map overview Semantic statistics

Lead

Nodes386
Edges385
Triples375
Avg. degree1.99
Density0.005181
Components1

Source & methodology

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

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

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