File:Cesium.jpg · Wikimedia Commons · See Wikimedia Commons
césium
Sign in to saveAlso known as Cs, element 55, 55Cs, cæsium, cesium
élément chimique de numéro atomique 55 et de symbole Cs
OverviewAI-generated
Caesium is a chemical element with the symbol Cs and atomic number 55. It was discovered in 1860. The standard atomic mass of caesium is 132.90545196. Its electron configuration is [Xe] 6s¹. The element typically exhibits an oxidation state of 1.
Caesium has an electronegativity of 0.79 and an ionization energy of 3400. Its Mohs' hardness is 0.2, and its ionic radius is 1.88. The standard molar entropy is 85.2. The canonical SMILES representation is [Cs]. The Unicode character for caesium is 銫.
In chemical databases, caesium is identified by the CID 5354618. Its InChIKey is TVFDJXOCXUVLDH-UHFFFAOYSA-N. The IUPAC name is cesium. It has a topological polar surface area of 0 and no hydrogen bond donors or acceptors. The element is referenced by 1,288 other encyclopedia articles.
Synthesized by Vinony from 28 facts across 4 sources: Wikidata, PubChem, PubMed, Vinony graph. Generated from structured data (not the Wikipedia text) and checked against those facts — may still contain errors.
Key facts
- Caesium.engvar
- en-OED
via Wikipedia infobox
Chemical data
- Formula
- Cs
- Molecular weight
- 132.905452 g/mol
- IUPAC name
- cesium
- SMILES
- [Cs]
- InChIKey
- TVFDJXOCXUVLDH-UHFFFAOYSA-N
- Polar surface area
- 0 Ų
- H-bond donors
- 0
- H-bond acceptors
- 0
- Formal charge
- 0
via PubChem
Research
20,625 papers- Caesium-137 gamma-ray beams.ReviewBJR supplement · 1996Burns JE
- Caesium accumulation by microorganisms: uptake mechanisms, cation competition, compartmentalization and toxicity.ReviewJournal of industrial microbiology · 1995Avery SVDOI: 10.1007/BF01569888
- Caesium-134 in man.Nature · 1962LIDEN K, ANDERSSON IODOI: 10.1038/1951040a0
- CHARACTERISATION OF RADIOACTIVE CAESIUM IN SEDIMENTS AT THE NOGAWA RIVER, JAPAN.Radiation protection dosimetry · 2022Inose S, Nanri Y, Saito R et al.DOI: 10.1093/rpd/ncac008
- INHIBITORY EFFECT OF CALCIUM ON CAESIUM ABSORPTION IN PLANT ROOTS.Radiation protection dosimetry · 2022Kihana M, Yamagami MDOI: 10.1093/rpd/ncac071
- CAESIUM RETENTION CHARACTERISTICS OF KNIFC-PAN RESIN FROM RIVER WATER.Radiation protection dosimetry · 2020Hegedűs M, Tazoe H, Yang G et al.DOI: 10.1093/rpd/ncaa109
- Simultaneous removal of caesium and strontium using different removal mechanisms of probiotic bacteria.Scientific reports · 2024Endo R, Karasawa S, Aoyagi HDOI: 10.1038/s41598-024-57678-8
- Gamma rays: caesium 137 teletherapy units.ReviewThe British journal of radiology · 1972Burns JE
via PubMed
Wikidata facts
- Subclass of
- s-block
- Part of
- alkali metal
- Named after
- sky blue
- Mass
- 132.90545196
- Image
- Cesium.jpg
Show 21 more facts
- element symbol
- Cs
- Commons category
- Caesium
- discoverer or inventor
- Gustav Kirchhoff
- topic's main category
- Category:Caesium
- time of discovery or invention
- 1860-01-01
- location of discovery
- Heidelberg
- atomic number
- 55
- Commons gallery
- Caesium
- canonical SMILES
- [Cs]
- chemical formula
- Cs
- standard molar entropy
- 85.2
- has characteristic
- paramagnetism
- oxidation state
- 1
- ionization energy
- 3400
- Mohs' hardness
- 0.2
- Unicode character
- 銫
- electronegativity
- 0.79
- different from
- cerium
- ionic radius
- 1.88
- electron configuration
- 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 4d¹⁰ 4p⁶ 5s² 5d¹⁰ 5p⁶ 6s¹
- on focus list of Wikimedia project
- Wikipedia:Vital articles/Level/4
Sources (9)
via Wikidata · CC0
Article · Français
Le césium, ou cæsium, est l'élément chimique de numéro atomique 55, de symbole Cs. Dans les conditions standard, le corps simple césium est un métal mou et ductile, blanc ou argenté à doré. Son point de fusion (28 °C) est proche de la température ambiante et du corps humain (CNTP), à laquelle il peut demeurer à l'état liquide par surfusion ; le césium partage cette propriété avec le gallium et le rubidium, le mercure étant le seul métal pur liquide et s'évaporant à température ambiante. Le césium est le plus alcalin des métaux alcalins (base la plus forte connue ; assez pour attaquer le verre). Ses propriétés chimiques sont proches de celles du rubidium et du potassium, qui appartiennent à la même famille. Il réagit violemment avec l'eau et l'air (réaction explosive). Il est extrêmement réactif et pyrophorique, et réagit avec l'eau même à une température aussi basse que −116 °C. On l'extrait de la pollucite (aluminosilicate Cs4Al4Si9O26·H2O) mais il est aussi présent à l’état de traces dans la lépidolite.
Abstract from DBpedia / Wikipedia · CC BY-SA
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