Research any topic before you write.

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

Strontium

Strontium is a chemical element; it has symbol Sr and atomic number 38. An alkaline earth metal, it is a soft silver-white yellowish metallic element that is highly chemically reactive. The metal forms a dark oxide layer when it is exposed to air. Strontium has physical and chemical properties similar to those of its two vertical neighbors in the…

Characters, History, Applications & Art

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 Strontium. 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.

82Sr
synth
83Sr
synth
84Sr
0.56%
85Sr
synth
86Sr
9.86%
87Sr
7%

Topics to explore

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

Overview

Characteristics

History

Occurrence

Production

Applications

Biological role

Nuclear waste

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.

Map overview Semantic statistics

Strontium

Nodes182
Edges181
Triples178
Avg. degree1.99
Density0.010989
Components1

How this topic connects Entity context

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

Strontium

Top relations

related to history · 23
Strontium → Adair Crawford, Considering, Crawford, Friedrich Gabriel Sulzer, Glasgow, Grunderde, He, In, Johann Friedrich Blumenbach, June, Royal Society, Scottish, Scottish Gaelic, Sir Humphry Davy, Sròn, Strontian, Strontites, Sìthein, The, This
has application · 13
Strontium → All, Because, Consuming, CRT, CRTs, However, In, The, Therefore, This, Thus, X-ray, X-rays
related to Characteristics · 13
Strontium → All, Ba, Besides, Ca, It, Its, O2, OH, Sr, SrO, SrO2, The, Three
related to Occurrence · 11
Strontium → At, Because, Earth, Earth's, In, Naturally, Of, Sr, Sr-90, SrCO3, SrSO4
related to Production · 11
Strontium → Although, Argentina, China, Either, Iran, January, Mexico, Spain, The, This, United States
related to Radioactive strontium · 10
Strontium → Bremsstrahlung, However, Metastron, RTG, RTGs, The, The Soviet Union, This, Thus, X-rays
related to External links · 8
Strontium → February, Nottingham, Strontium Archived, The Periodic Table, University, Videos, Wayback MachineStrontium, WebElements
related to Effect on the human body · 7
Strontium → Calcium, Elimination, However, In, Stable, The, This
related to Isotopes · 7
Strontium → Chernobyl, Its, Natural, Of, The, This, While
related to Nuclear waste · 4
Strontium → Exposure, It, Its, Strontium-90

Important terminology Word statistics

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

Important terminology

calcium used barium bone metal strontianite 90sr celestine nuclear body also production sr isotopes mineral strontian oxide stable process half-life

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
Strontium82Srsynth1.00infobox
Strontium83Srsynth1.00infobox
Strontium84Sr0.56%1.00infobox
Strontium85Srsynth1.00infobox
Strontium86Sr9.86%1.00infobox
Strontium87Sr7%1.00infobox
Strontium88Sr82.6%1.00infobox
Strontium89Srsynth1.00infobox
Strontium90Srtrace1.00infobox
StrontiumAppearancesilvery white metallic; with a pale yellow tint1.00infobox
Strontiumat T (K)7961.00infobox
StrontiumAtomic number (Z)381.00infobox
StrontiumAtomic radiusempirical: 215 pm1.00infobox
StrontiumBlocks-block1.00infobox
StrontiumBoiling point1650 K ​(1377 °C, ​2511 °F)1.00infobox
StrontiumCAS Number7440-24-61.00infobox
StrontiumCovalent radius195±10 pm1.00infobox
StrontiumCrystal structure​face-centered cubic (fcc) (cF4)1.00infobox
StrontiumDensity (at 20° C)2.582 g/cm31.00infobox
StrontiumDiscoveryWilliam Cruickshank (1787)1.00infobox
StrontiumElectrical resistivity132 nΩ⋅m (at 20 °C)1.00infobox
StrontiumElectron configuration[Kr] 5s21.00infobox
StrontiumElectronegativityPauling scale: 0.951.00infobox
StrontiumElectrons per shell2, 8, 18, 8, 21.00infobox
StrontiumFirst isolationHumphry Davy (1808)1.00infobox
StrontiumGroupgroup 2 (alkaline earth metals)1.00infobox
StrontiumHeat of fusion7.43 kJ/mol1.00infobox
StrontiumHeat of vaporization141 kJ/mol1.00infobox
StrontiumIonization energies1st: 549.5 kJ/mol1.00infobox
StrontiumIonization energies2nd: 1064.2 kJ/mol1.00infobox

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.