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Cs - Cesium. Cesium (Caesium) is a soft and silvery-gold metal, which belongs to the alkali group. Cesium is a very rare element and two main sources for cesium-containing ore is Canada and Zimbabwe. Cesium, which is mined mostly from pollucite, has a total of 39 known isotopes. Cesium is used in photoelectric cells used to convert sunlight ...


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Strong Lines of Cesium ( Cs )

Cesium (Cs) Strong Lines of Cesium ( Cs ) Intensity : Vacuum Wavelength (Å) Spectrum : Reference : 20 : 639.36


Our cesium page has over 290 facts that span 97 different quantities. Each entry has a full citation identifying its source. Areas covered include atomic structure, physical properties, atomic interaction, thermodynamics, identification, atomic size, crystal structure, history, abundances, and nomenclature.


Cesium has 55 electrons, only one of which is in the outermost shell. 133Cs is the only stable isotope of cesium, and is the only isotope we consider in this reference. The mass is taken from the high-precision measurement of [2], and the density, melting point, boiling point, and heat capacities are taken from [3]. ...


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Cesium – Wikipedia

Cesium, lausutaan [keesium], on alkuaine, jonka kemiallinen merkki on Cs (lat. caesium) ja järjestysluku 55. Se on pehmeä hopeanhohtoinen alkalimetalli, joka hapettuu nopeasti joutuessaan tekemisiin ilman kanssa. Metallinen cesium reagoi kiivaasti monien aineiden, kuten hapen ja veden kanssa. Cesium sulaa jo ihon lämmöllä (sulamispiste 28,44 °C). ...


Cesium Cs (Element 55) of Periodic Table. Cerium is a silvery-gold, soft and ductile. It is the most electropositive and alkaline element. Cerium, mercury, and gallium are the only metals that are liquid at room temperature. Cerium metal …


CESIUM page 2 of 6 This Fact Sheet is a summary source of information of all potential and most severe health hazards that may result from exposure. Duration …


Answer to: The element cesium (Cs) freezes at 28.4 degrees C, and its molar enthalpy heat of fusion is Delta H_{fus} = 2.09 kJ/mol. a. Calculate...


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Caesium - Wikipedia

Cesium Properties. Cesium (or Caesium ) is a Block S, Group 1, Period 6 element. The number of electrons in each of Cesium's shells is 2, 8, 18, 18, 8, 1 and its electronic configuration is [Xe] 6s 1.The cesium atom has a radius of 265.5.pm and its Van der Waals radius is 200.pm.


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Caesium-137 - Wikipedia

Caesium-137 (137 55 Cs), or radiocaesium, is a radioactive isotope of caesium that is formed as one of the more common fission products by the nuclear fission of uranium-235 and other fissionable isotopes in nuclear reactors and nuclear weapons.Trace quantities also originate from natural fission of uranium-238.It is among the most problematic of the short-to-medium-lifetime …


Cesium RTOS is a full-featured embedded operating system that was originally forked from Micrium µC/OS. The codebase is strictly developed and maintained by Weston Embedded Solutions. It features support for TCP/IP, USB-Device, USB-Host, and Modbus, as well as a robust file system.


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Cesium | Cs - PubChem

Cesium is a naturally occurring element found combined with other elements in rocks, soil, and dust in low amounts. Naturally occurring cesium is not radioactive and is referred to as stable cesium.There is only one stable form of cesium naturally present in the environment,133Cs (read as cesium one-thirty-three). Nuclear explosions or the breakdown of uranium in fuel elements …


Cs-Cr-O on both Coupon-10 and Coupon-11, however, was identified as cesium chromate 47,48 (Cs 2 CrO 4) by Raman spectroscopy (Figure Figure6 6). It is inferred that the underlying process in both locations (temperatures) is essentially similar.


Cesium (Cs) Cesium, an alkali metal, was discovered spectroscopically in 1860. It occurs in lepidolite, pollucte, and other sources. Cesium is silvery-white, soft, ductile, and the most alkaline and most electropositive element. Cesium is one of just three metals that are liquid at room temperature. It reacts explosively with cold water and ...


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Cesium ion

Cesium ion


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Cesium-137 (Cs-137) - CDC

Cesium-137 (Cs-137) Half-life: 30.17 years Beta particles: electrons ejected from the nucleus of a decaying atom. Although they can be stopped by a thin sheet of aluminum, beta particles can penetrate the dead skin layer, potentially causing burns. They can pose a serious direct or external radiation threat and can be lethal


Caesium Facts. Caesium (Cs) has an atomic number of fifty-five and fifty-five protons in the nucleus. A silvery-gold, soft metal, it is the most alkaline element on Earth. Caesium was discovered by Robert Bunsen and Gustav Kirchhoff in 1860. Its name, which is Latin for "sky blue," comes from the blue emission lines it gives off in spectroscopy.


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Cesium - USGS

Naturally occurring cesium consists of the stable isotope Cs133; the 30 artificial radioisotopes range from Cs 116 to Cs 146, of which Cs 137 is the most used and well-known. Cs 137 is a reactor byproduct with applications in agriculture, industry and construction, radiotherapy for


Recently, a new cesium -131 (131 Cs) radioactive seed has been introduced (Iso Ray, Richmond, WA) in the clinical practice for permanent seed implants of early prostate cancer. 131 Cs is a 4.5 mm × 0.8 mm seed, titanium - encased ceramic with gold wire.


Everyone's favourite alkali metal - Caesium - reacts with water.Discussed by Professor Martyn Poliakoff.More chemistry at


Cesium reacts explosively with cold water, and reacts with ice at temperatures above -116°C. Cesium hydroxide is a strong base and attacks glass. Cesium reacts with the halogens to form a fluoride, chloride, bromide, and iodide. …


Cesium Properties. Cesium (or Caesium ) is a Block S, Group 1, Period 6 element. The number of electrons in each of Cesium's shells is 2, 8, 18, 18, 8, 1 and its electronic configuration is [Xe] 6s 1.The cesium atom has a radius of 265.5.pm and its Van der Waals radius is 200.pm.


Caesium is a soft, gold-coloured metal that is quickly attacked by air and reacts explosively in water. Uses. The most common use for caesium compounds is as a drilling fluid. They are also used to make special optical glass, as a catalyst promoter, in vacuum tubes and in radiation monitoring equipment.


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Caesium fluoride - Wikipedia

Caesium fluoride or cesium fluoride is an inorganic compound with the formula CsF and it is a hygroscopic white salt. Caesium fluoride can be used in organic synthesis as a source of the fluoride anion. Caesium also has the highest electropositivity of all non-radioactive elements and fluorine has the highest electronegativity of all elements.


Name: Cesium Symbol: Cs Atomic Number: 55 Atomic Mass: 132.90546 amu Melting Point: 28.5 °C (301.65 K, 83.3 °F) Boiling Point: 678.4 °C (951.55005 K, 1253.12 °F) Number of Protons/Electrons: 55 Number of Neutrons: 78 Classification: Alkali Metal Crystal Structure: Cubic Density @ 293 K: 1.873 g/cm 3 Color: silver British Spelling: Caesium


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Atomic Data for Cesium (Cs)

Cs I Ground State 1s 2 2s 2 2p 6 3s 2 3p 6 3d 1 0 4s 2 4p 6 4d 1 0 5s 2 5p 6 6s 2 S 1 / 2 Ionization energy 31406.46769 cm-1 (3.893905 eV) Ref. WS87 Cs II Ground State 1s 2 2s 2 2p 6 3s 2 3p 6 3d 1 0 4s 2 4p 6 4d 1 0 5s 2 5p 6 1 S 0 Ionization energy 186777.4 cm-1 (23.15744 eV) Ref. S81-1 (23.15744 eV) Ref. S81


Cesium-137 Part 1 – Radioactive Material Identification Common Names: Cesium-137 Chemical Symbol: Cs-137 or 137Cs Atomic Number: 55 Mass Number: 137 (82 neutrons) Chemical Form: Cesium chloride Physical Form: A pellet of cesium ceramic housed in a welded stainless steel capsule Part 2 – Radiation Characteristics


Cesium (Cs) is a compound element with atomic number 55 in the periodic table found by Gustov Kirchhoff and Robert Bunsen in the year 1860. This name has been derived from a Latin word Caesius which means sky blue, as it ignites with blue fire.


Caesium: isolation. Isolation: caesium (cesium in USA) would not normally be made in the laboratory as it is available commercially. All syntheses require an electrolytic step as it is so difficult to add an electron to the poorly electronegative caesium ion Cs +. Caesium is not made by the same method as sodium as might have been expected.


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Caesium - Periodic Table

Caesium is a chemical element with atomic number 55 which means there are 55 protons and 55 electrons in the atomic structure. The chemical symbol for Caesium is Cs. Caesium is a soft, silvery-gold alkali metal with a melting point of 28.5 °C, which makes it one of only five elemental metals that are liquid at or near room temperature.


Cesium (Cs) is a chemical element in the periodic table with atomic number 55 discovered by Fustov Kirchhoff and Robert Bunsen in the year 1860. The name is derived from a Latin word Caesius which means sky blue, as it burns with a blue flame.


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Cesium | ToxFAQs™ | ATSDR

There is only one stable form of cesium naturally present in the environment, 133 Cs (read as cesium one-thirty-three). Nuclear explosions or the breakdown of uranium in fuel elements can produce two radioactive forms of cesium, 134 Cs and 137 Cs. Both isotopes decay into non-radioactive elements.


Cesium Atomic Clock. The current time standard for the United States is a cesium atomic frequency standard at the National Institute of Standards and Technology in Boulder, Colorado. In 1967 a standard second was adopted based on the frequency of a transition in the Cs-133 atom: 1 second = 9,192, 631,770 cycles of the standard Cs-133 transition


Cesium or caesium is a metal with the element symbol Cs and atomic number 55. This chemical element is distinctive for several reasons. Here is a collection of cesium element facts and atomic data:


The radioactive isotopes cesium-137 and cesium-134 are significant fission products because of their high fission yield, their long half-lives, and their biochemical similarity to potassium. The fission yield of cesium-137 in nuclear reactions is relatively high, about 6 atoms of cesium-137 are produced per 100 fission events.


cesium (Cs), also spelled caesium, chemical element of Group 1 (also called Group Ia) of the periodic table, the alkali metal group, and the first element to be discovered spectroscopically (1860), by German scientists Robert Bunsen and Gustav Kirchhoff, who named it for the unique blue lines of its spectrum (Latin caesius, "sky-blue"). This silvery metal with a golden cast is …


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Cesium - Cesium (Cs)

55: Cesium - Cesium [Cs] Group: 1 Period: 6 Atomic number: 55 Atomic mass: 132.9054519 Configuration: [Xe] 6s 1 Atomic radius: 298 pm Covalent radius: 244 pm Electron affinity: 45.5 eV Ionization energy: 3.8939 eV Electronic term: 2 S 1/2 Mass fraction in the earth crust: 0.0000019 Mass fraction in the earth space: 0.0000000008 ...


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Cesium - iThyroid

Cesium -accumulating bacteria, strains CS98 and CS402, were isolated from soil by a radioactive autoradiographic method using 137Cs. These strains displayed the rod-coccus growth cycle and contained mesodiaminopimelic acid, mycolic acids, and tuberculostearic acids. cesium accumulating bacteria.doc.