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Calcium: Characters, History, Applications & Art

Calcium is a chemical element; it has symbol Ca and atomic number 20. As an alkaline earth metal, calcium is a reactive metal that forms a dark oxide-nitride layer when exposed to air. Its physical and chemical properties are most similar to its heavier homologues strontium and barium. It is the fifth most abundant element in Earth's crust, and the third…

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Calcium topic overview

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

Related topics
265
Source areas
7
Connected nodes
276
Extracted relationships
215
Concept neighborhoods
55
Bridge connections
276

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.

Characteristics · 74 topics
Overview · 48 topics
Biological and pathological role · 43 topics
Occurrence and production · 39 topics
Applications · 32 topics
History · 15 topics
Food sources · 14 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.

40Ca
96.9%
41Ca
trace
42Ca
0.647%
43Ca
0.135%
44Ca
2.09%
45Ca
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

Characteristics

History

Occurrence and production

Applications

Food sources

Biological and pathological role

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 Calcium connects Entity context

The extracted context around Calcium shows recurring relationship patterns in the source. For example, Calcium → Among, At, Bahamas, Ca5, CaF2, Canada, CaSO4, China, Cl, Corals, Earth's, Florida Keys, France, Iceland, In, It, Minerals, OH, PO4, Red Sea Another extracted example is Calcium → All, Besides, Bulk, Ca, CaCO3, CaO, CaO2, CaSO4, For, It, Like, O2, OH, The, When. Use these groups to spot repeated connection types before inspecting the individual relationships.

Calcium

Top relations

related to Occurrence and production · 24
Calcium → Among, At, Bahamas, Ca5, CaF2, Canada, CaSO4, China, Cl, Corals, Earth's, Florida Keys, France, Iceland, In, It, Minerals, OH, PO4, Red Sea
related to Chemical properties · 15
Calcium → All, Besides, Bulk, Ca, CaCO3, CaO, CaO2, CaSO4, For, It, Like, O2, OH, The, When
related to history · 14
Calcium → About, BC, CaCO3, CaSO4, Giza, Great Pyramid, Khafajah, Latin, Lime, Mesopotamia, Romans, The, This, Tutankhamun
related to Bibliography · 10
Calcium → Calcium Alloys, Hluchan, Industrial Chemistry, ISBN, Kenneth, Pomerantz, Stephen, Ullmann's Encyclopedia, Weinheim, Wiley-VCH
related to Food sources · 10
Calcium → Because, EFSA, European Food Safety Authority, Foods, From, Institute, IOM, Medicine, UL, ULs
related to Classification · 9
Calcium → Ar, Ca, Ca2, Hence, Hypothetical, Like, MX, MX2, This
related to Geochemical cycling · 9
Calcium → Ca2, CaCO3, CO2, DIC, Dissolved CO2, HCO, In, The, These
is a · 8
Calcium → chemical element, fifth most abundant element in the Earth's crust, first, mixture of five stable isotopes, most abundant metal and the fifth-most abundant element in the human body, only element with two primordial doubly magic isotopes, poorer conductor of electricity than copper or aluminium by volume, reactive metal that forms a dark oxide-nitride layer when exposed to air
related to Abnormal serum levels · 7
Calcium → All, Chronic, Conversely, Excess, However, PTH, Symptoms
Ionisation energies · 4
Calcium → (more), 1st: 589.8 kJ/mol, 2nd: 1145.4 kJ/mol, 3rd: 4912.4 kJ/mol

Important terminology

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

Important terminology

metal used also isotopes element strontium lime bone compounds barium aluminium stable chemical magnesium 48ca high ca2 40ca carbon oxygen

Calcium relationships Subject–Predicate–Object triples

TTTA extracted 215 structured relationships around Calcium. Examples in this analysis include Calcium → 40Ca → 96.9% and Calcium → 41Ca → trace. The table shows each extracted connection, where it came from and its confidence.

SubjectPredicateObjectConfidenceSrc
Calcium40Ca96.9%1.00infobox
Calcium41Catrace1.00infobox
Calcium42Ca0.647%1.00infobox
Calcium43Ca0.135%1.00infobox
Calcium44Ca2.09%1.00infobox
Calcium45Casynth1.00infobox
Calcium46Ca0.004%1.00infobox
Calcium47Casynth1.00infobox
Calcium48Ca0.187%1.00infobox
CalciumAppearancedull gray, silver; with a pale yellow tint1.00infobox
Calciumat T (K)8641.00infobox
CalciumAtomic number (Z)201.00infobox
CalciumAtomic radiusempirical: 197 pm1.00infobox
CalciumBlocks-block1.00infobox
CalciumBoiling point1757 K ​(1484 °C, ​2703 °F)1.00infobox
CalciumBrinell hardness170–416 MPa1.00infobox
CalciumBulk modulus17 GPa1.00infobox
CalciumCAS Number7440-70-21.00infobox
CalciumCovalent radius176±10 pm1.00infobox
CalciumCrystal structure​face-centred cubic (fcc) (cF4)1.00infobox
CalciumDensity (at 20° C)1.526 g/cm31.00infobox
CalciumDiscovery and first isolationHumphry Davy (1808)1.00infobox
CalciumElectrical resistivity33.6 nΩ⋅m (at 20 °C)1.00infobox
CalciumElectron configuration[Ar] 4s21.00infobox
CalciumElectronegativityPauling scale: 1.001.00infobox
CalciumElectrons per shell2, 8, 8, 21.00infobox
CalciumGroupgroup 2 (alkaline earth metals)1.00infobox
CalciumHeat of fusion8.54 kJ/mol1.00infobox
CalciumHeat of vaporisation154.7 kJ/mol1.00infobox
CalciumIonisation energies1st: 589.8 kJ/mol1.00infobox

Related concept clusters Concept neighborhoods

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

  • Calcium
    • Metal
    • Used
    • Compounds
    • Also
    • Isotopes
    • Common
    • Magnesium
    • Strontium
    • Element
    • Bone
    • Lead
    • Oxide
  • calcium
    • Metal
    • Used
    • Compounds
    • Also
    • Isotopes
    • Common
    • Magnesium
    • Strontium
    • Element
    • Bone
    • Lead
    • Oxide
  • chemical element
    • Group
    • Metallic
    • Aluminium
    • Metal
    • Isotopes
    • Earth
    • Oxygen
    • Barium
    • Magnesium
    • Oxide
    • Strontium
    • 48ca
  • alkaline earth metal
    • Group
    • Magnesium
    • Metal
    • Metallic
    • Strontium
    • 44ca
    • Aluminium
    • Barium
    • Common
    • 40ca
    • Lead
    • Also
  • barium
    • Strontium
    • Magnesium
    • Oxide
    • Earth
    • Group
    • Oxygen
    • Aluminium
    • First
    • Metal
    • Chemical
    • Stable
    • Lead
  • aluminium
    • Magnesium
    • Metal
    • Element
    • Earth
    • Group
    • Lead
    • Metallic
    • Carbon
    • Due
    • Barium
    • Chemical
    • Lime
  • calcium carbonate
    • Common
    • Metal
    • Used
    • Compounds
    • Limestone
    • Also
    • Isotopes
    • Earth
    • Ions
    • Carbon
    • Magnesium
    • Strontium
  • calcium supplementation
    • Metal
    • Used
    • Compounds
    • Also
    • Isotopes
    • Common
    • Magnesium
    • Strontium
    • Element
    • Bone
    • Lead
    • Oxide

Connections between topic areas Semantic bridges

For Calcium, one of the stronger structural bridges in this analysis connects Calcium with Characteristics. 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
CalciumCharacteristics · splits 202 ⟂ 75
CalciumOverview · splits 228 ⟂ 49
CalciumBiological and pathological role · splits 233 ⟂ 44
CalciumOccurrence and production · splits 237 ⟂ 40
CalciumApplications · splits 244 ⟂ 33
CalciumHistory · splits 261 ⟂ 16
CalciumFood sources · splits 262 ⟂ 15
CalciumBibliography · splits 273 ⟂ 4

Map overview Semantic statistics

Calcium

Nodes277
Edges276
Triples215
Avg. degree1.99
Density0.00722
Components1

Source & methodology

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

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

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