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Caesium

Caesium (IUPAC spelling; also spelled cesium in American English) is a chemical element; it has symbol Cs and atomic number 55. It is a soft, silvery-golden alkali metal with a melting point of 28.5 °C (83.3 °F; 301.6 K), which makes it one of only five elemental metals that are liquid at or near room temperature. Caesium has physical and chemical…

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Characters, History & Applications

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Key facts & relationships

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

131Cs
synth
133Cs
100%
134Cs
synth
135Cs
trace
137Cs
synth
Alternative name
cesium (US)

Topics to explore

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Overview

Spelling

Characteristics

Production

History

Applications

Health and safety hazards

Advanced semantic analysis

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Map overview Semantic statistics

Number of nodes, edges, triples, density and central hubs. Use it to gauge the size and connectivity of the map.

Caesium

Nodes363
Edges362
Triples234
Avg. degree1.99
Density0.00551
Components1

How this topic connects Entity context

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Caesium

Top relations

related to External links · 21
Caesium → Andrey Yu, Angewandte Chemie, Bibcode, Cesium, CsF2, Fluorine, Gabriel, Hoffmann, Mao-Sheng, Merino, Miao, Mineral Commodity Summaries, Molecular CsF5, Nottingham, Roald, Rogachev, The Periodic Table, The Royal Institution, University, Videos
related to Occurrence · 19
Caesium → Al, AlSi, Be, Because, BF, Consequently, Cs, Cs2O, Due, During, Earth's, It, KCl, KMgCl, Percentage, SiO, The, Therefore, Within
related to history · 17
Caesium → After, Because, Bunsen, Cs, Dürkheim, From, Germany, Gustav Kirchhoff, In, Kirchhoff, Latin, Potassium, Rb, Robert Bunsen, The, To, US
related to Compounds · 12
Caesium → Cs, CsF, CsSbCl, Its, Many, More, Most, One, Oxides, Salts, The, This
related to Chemical properties · 11
Caesium → As, Because, Cs, GPa, However, In, It, Some, The, This, Under
related to Production · 11
Caesium → After, CeCl, Cs, CsCl, HBr, HCl, HF, In, Mining, The, With
related to Physical properties · 10
Caesium → At, Copernicium, CsHg, In, It, Mercury, Mohs, Of, The, When
related to Spelling · 10
Caesium → ACS, Applied Chemistry, In, International Union, IUPAC, Latin, Pure, The, The American Chemical Society, Webster's New International Dictionary
has application · 9
Caesium → As, Caesium-134, Caesium-137, It, Its, Known, Radioactive, The, While
related to Petroleum exploration · 9
Caesium → Alkali, Aqueous, Completion, Cs, Furthermore, HCOO, The, Unlike, ZnBr

Important terminology Word statistics

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Important terminology

cs used metal metals also alkali element chloride rubidium caesium-137 water potassium compounds pollucite stable nuclear applications sodium isotopes atomic

Entity relationships Subject–Predicate–Object triples

Extracted RDF-like relationships with confidence and source. The table includes structured facts and lower-confidence contextual relations.
SubjectPredicateObjectConfidenceSrc
Caesium131Cssynth1.00infobox
Caesium133Cs100%1.00infobox
Caesium134Cssynth1.00infobox
Caesium135Cstrace1.00infobox
Caesium137Cssynth1.00infobox
CaesiumAlternative namecesium (US)1.00infobox
CaesiumAppearancepale gold1.00infobox
Caesiumat T (K)4181.00infobox
CaesiumAtomic number (Z)551.00infobox
CaesiumAtomic radiusempirical: 265 pm1.00infobox
CaesiumBlocks-block1.00infobox
CaesiumBoiling point944 K ​(671 °C, ​1240 °F)1.00infobox
CaesiumBrinell hardness0.14 MPa1.00infobox
CaesiumBulk modulus1.6 GPa1.00infobox
CaesiumCAS Number7440-46-21.00infobox
CaesiumCovalent radius244±11 pm1.00infobox
CaesiumCritical point1938 K, 9.4 MPa1.00infobox
CaesiumCrystal structure​body-centred cubic (bcc) (cI2)1.00infobox
CaesiumDensity (at 20° C)1.886 g/cm31.00infobox
CaesiumDiscoveryGustav Kirchhoff and Robert Bunsen (1860)1.00infobox
CaesiumElectrical resistivity205 nΩ⋅m (at 20 °C)1.00infobox
CaesiumElectron configuration[Xe] 6s11.00infobox
CaesiumElectronegativityPauling scale: 0.791.00infobox
CaesiumElectrons per shell2, 8, 18, 18, 8, 11.00infobox
CaesiumFirst isolationCarl Setterberg (1882)1.00infobox
CaesiumGroupgroup 1: hydrogen and alkali metals1.00infobox
CaesiumHeat of fusion2.09 kJ/mol1.00infobox
CaesiumHeat of vaporization63.9 kJ/mol1.00infobox
CaesiumIonization energies1st: 375.7 kJ/mol1.00infobox
CaesiumIonization energies2nd: 2234.3 kJ/mol1.00infobox

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