Definitions for cesium
ˈsi zi əmce·sium

Princeton's WordNetRate this definition:0.0 / 0 votes

1. cesium, caesium, Cs, atomic number 55noun

   a soft silver-white ductile metallic element (liquid at normal temperatures); the most electropositive and alkaline metal

WikipediaRate this definition:0.0 / 0 votes

1. cesium

   Caesium (IUPAC spelling) (or cesium in American English) is a chemical element with the 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), which makes it one of only five elemental metals that are liquid at or near room temperature. Caesium has physical and chemical properties similar to those of rubidium and potassium. It is pyrophoric and reacts with water even at −116 °C (−177 °F). It is the least electronegative element, with a value of 0.79 on the Pauling scale. It has only one stable isotope, caesium-133. Caesium is mined mostly from pollucite. The element has 40 known isotopes, making it, along with barium and mercury, one of the elements with the most isotopes. Caesium-137, a fission product, is extracted from waste produced by nuclear reactors. The German chemist Robert Bunsen and physicist Gustav Kirchhoff discovered caesium in 1860 by the newly developed method of flame spectroscopy. The first small-scale applications for caesium were as a "getter" in vacuum tubes and in photoelectric cells. In 1967, acting on Einstein's proof that the speed of light is the most-constant dimension in the universe, the International System of Units used two specific wave counts from an emission spectrum of caesium-133 to co-define the second and the metre. Since then, caesium has been widely used in highly accurate atomic clocks. Since the 1990s, the largest application of the element has been as caesium formate for drilling fluids, but it has a range of applications in the production of electricity, in electronics, and in chemistry. The radioactive isotope caesium-137 has a half-life of about 30 years and is used in medical applications, industrial gauges, and hydrology. Nonradioactive caesium compounds are only mildly toxic, but the pure metal's tendency to react explosively with water means that caesium is considered a hazardous material, and the radioisotopes present a significant health and ecological hazard in the environment.

ChatGPTRate this definition:0.0 / 0 votes

1. cesium

   Cesium is a chemical element with the symbol Cs and atomic number 55. It is a soft, silvery-gold alkali metal with a low melting point, making it one of five elemental metals that are liquid at near-room temperature. Cesium is extremely reactive and combines readily with oxygen in the air. Its most common use is in atomic clocks, which are incredibly precise. Additionally, it is used in photoelectric cells due to its ready emission of electrons.

U.S. National Library of MedicineRate this definition:0.0 / 0 votes

1. Cesium

   A member of the alkali metals. It has an atomic symbol Cs, atomic number 50, and atomic weight 132.91. Cesium has many industrial applications, including the construction of atomic clocks based on its atomic vibrational frequency.

Matched Categories

1. • Metallic Element

Usage in printed sourcesFrom: 

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Anagrams for cesium »

1. miscue

How to pronounce cesium?

1. Alex

   US English

   David

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   Mark

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   Daniel

   British

   Libby

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   Mia

   British

   Karen

   Australian

   Hayley

   Australian

   Natasha

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   Veena

   Indian

   Priya

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   Neerja

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   Zira

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   Oliver

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   Wendy

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   Fred

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   South African

How to say cesium in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of cesium in Chaldean Numerology is: 4

2. Pythagorean Numerology

   The numerical value of cesium in Pythagorean Numerology is: 7

Popularity rank by frequency of use

References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=cesium
2. ^ Wikipedia
   https://en.wikipedia.org/wiki/Cesium
3. ^ ChatGPT
   https://chat.openai.com
4. ^ Usage in printed sources
   https://books.google.com/ngrams/graph?content=cesium