Entrée : Césium
URI: https://terra-vocabulary.org/ncl/DataTerraRepositoryFairIncubator/motsClefs/c_e7642025
[Wikipedia] Caesium (IUPAC spelling[6]) (also spelled cesium in American English)[note 1] 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.[note 2] Caesium has physical and chemical properties similar to those of rubidium and potassium. The most reactive of all metals, 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, while the radioisotopes, especially caesium-137, a fission product, are extracted from waste produced by nuclear reactors.
Métadonnées principales
| est un | Concept | feature of interest |
| modifié le | 17 Nov 2023 08:31:48.986 |
| soumis par | Hélène Bressan |
| accepté le | 22 May 2023 15:20:56.995 |
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| date accepted |
22 May 2023 15:20:56.995
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| date submitted |
22 May 2023 13:21:09.655
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| definition |
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| description |
[Wikipedia] Caesium (IUPAC spelling[6]) (also spelled cesium in American English)[note 1] 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.[note 2] Caesium has physical and chemical properties similar to those of rubidium and potassium. The most reactive of all metals, 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, while the radioisotopes, especially caesium-137, a fission product, are extracted from waste produced by nuclear reactors.
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Concept
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| modified |
17 Nov 2023 08:31:48.986
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| notation |
c_e7642025
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mots clefs
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| status |
status experimental
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register item
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4
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Définition
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Cs
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| description |
[Wikipedia] Caesium (IUPAC spelling[6]) (also spelled cesium in American English)[note 1] 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.[note 2] Caesium has physical and chemical properties similar to those of rubidium and potassium. The most reactive of all metals, 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, while the radioisotopes, especially caesium-137, a fission product, are extracted from waste produced by nuclear reactors.
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| exact match |
c e7642025
| 1103
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| in scheme |
Vocabulaire des mots clefs
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| same as |
c e7642025
| 1103
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| top concept of |
Vocabulaire des mots clefs
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Concept
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| was attributed to |
Pôle THEIA
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