caesium - significado y definición. Qué es caesium
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Qué (quién) es caesium - definición


Caesium         
  • The portion of the total radiation dose (in air) contributed by each isotope plotted against time after the [[Chernobyl disaster]]. Caesium-137 became the primary source of radiation about 200 days after the accident.<ref>Data from [https://archive.org/details/TheRadiochemicalManual The Radiochemical Manual] and Wilson, B. J. (1966) ''The Radiochemical Manual'' (2nd ed.).</ref>
  • Caesium chloride powder
  • alt=A person adds a small amount of metal to a petri dish with cold water which produces a small explosion.
  • 2}}+). Alternatively, caesium-137 may decay directly into barium-137 by a 0.4% probability beta emission.
  • alt=The stick and ball diagram shows three regular octahedra, which are connected to the next one by one surface and the last one shares one surface with the first. All three have one edge in common. All eleven vertices are purple spheres representing caesium, and at the center of each octahedron is a small red sphere representing oxygen.
  •  alt=27 small grey spheres in 3 evenly spaced layers of nine. 8 spheres form a regular cube and 8 of those cubes form a larger cube. The grey spheres represent the caesium atoms. The center of each small cube is occupied by a small green sphere representing a chlorine atom. Thus, every chlorine is in the middle of a cube formed by caesium atoms and every caesium is in the middle of a cube formed by chlorine.
  • alt=Y-shaped yellowish crystal in glass ampoule, looking like the branch of a pine tree
  • bibcode=2015NatCo...6.7943S}}</ref>
  • alt=Electrons beamed from an electron gun hit and ionize neutral fuel atoms; in a chamber surrounded by magnets, the positive ions are directed toward a negative grid that accelerates them. The force of the engine is created by expelling the ions from the rear at high velocity. On exiting, the positive ions are neutralized from another electron gun, ensuring that neither the ship nor the exhaust is electrically charged and are not attracted.
  • alt=A laboratory table with some optical devices on it.
  •  alt=Three middle-aged men, with the one in the middle sitting down. All wear long jackets, and the shorter man on the left has a beard.
  • alt=A white mineral, from which white and pale pink crystals protrude
  • Caesium crystals (golden) compared to [[rubidium]] crystals (silvery)
  • alt=A room with a black box in the foreground and six control cabinets with space for five to six racks each. Most, but not all, of the cabinets are filled with white boxes.
CHEMICAL ELEMENT WITH SYMBOL CS AND ATOMIC NUMBER 55
Cæsium; Cesium; Element 55; Radioactive cesium poisoning; Cs (element); Caesium compound; Caesium compounds; Compounds of caesium; Radioactive caesium poisoning; Cesium compounds; Cesium compound; Compounds of cesium; Сaesium; History of caesium
Caesium (IUPAC spelling) (or cesium in American English). The American Chemical Society (ACS) has used the spelling cesium since 1921, following Webster's New International Dictionary.
Caesium         
  • The portion of the total radiation dose (in air) contributed by each isotope plotted against time after the [[Chernobyl disaster]]. Caesium-137 became the primary source of radiation about 200 days after the accident.<ref>Data from [https://archive.org/details/TheRadiochemicalManual The Radiochemical Manual] and Wilson, B. J. (1966) ''The Radiochemical Manual'' (2nd ed.).</ref>
  • Caesium chloride powder
  • alt=A person adds a small amount of metal to a petri dish with cold water which produces a small explosion.
  • 2}}+). Alternatively, caesium-137 may decay directly into barium-137 by a 0.4% probability beta emission.
  • alt=The stick and ball diagram shows three regular octahedra, which are connected to the next one by one surface and the last one shares one surface with the first. All three have one edge in common. All eleven vertices are purple spheres representing caesium, and at the center of each octahedron is a small red sphere representing oxygen.
  •  alt=27 small grey spheres in 3 evenly spaced layers of nine. 8 spheres form a regular cube and 8 of those cubes form a larger cube. The grey spheres represent the caesium atoms. The center of each small cube is occupied by a small green sphere representing a chlorine atom. Thus, every chlorine is in the middle of a cube formed by caesium atoms and every caesium is in the middle of a cube formed by chlorine.
  • alt=Y-shaped yellowish crystal in glass ampoule, looking like the branch of a pine tree
  • bibcode=2015NatCo...6.7943S}}</ref>
  • alt=Electrons beamed from an electron gun hit and ionize neutral fuel atoms; in a chamber surrounded by magnets, the positive ions are directed toward a negative grid that accelerates them. The force of the engine is created by expelling the ions from the rear at high velocity. On exiting, the positive ions are neutralized from another electron gun, ensuring that neither the ship nor the exhaust is electrically charged and are not attracted.
  • alt=A laboratory table with some optical devices on it.
  •  alt=Three middle-aged men, with the one in the middle sitting down. All wear long jackets, and the shorter man on the left has a beard.
  • alt=A white mineral, from which white and pale pink crystals protrude
  • Caesium crystals (golden) compared to [[rubidium]] crystals (silvery)
  • alt=A room with a black box in the foreground and six control cabinets with space for five to six racks each. Most, but not all, of the cabinets are filled with white boxes.
CHEMICAL ELEMENT WITH SYMBOL CS AND ATOMIC NUMBER 55
Cæsium; Cesium; Element 55; Radioactive cesium poisoning; Cs (element); Caesium compound; Caesium compounds; Compounds of caesium; Radioactive caesium poisoning; Cesium compounds; Cesium compound; Compounds of cesium; Сaesium; History of caesium
·noun A rare alkaline metal found in mineral water;
- so called from the two characteristic blue lines in its spectrum. It was the first element discovered by spectrum analysis, and is the most strongly basic and electro-positive substance known. Symbol Cs. Atomic weight 132.6.
caesium         
  • The portion of the total radiation dose (in air) contributed by each isotope plotted against time after the [[Chernobyl disaster]]. Caesium-137 became the primary source of radiation about 200 days after the accident.<ref>Data from [https://archive.org/details/TheRadiochemicalManual The Radiochemical Manual] and Wilson, B. J. (1966) ''The Radiochemical Manual'' (2nd ed.).</ref>
  • Caesium chloride powder
  • alt=A person adds a small amount of metal to a petri dish with cold water which produces a small explosion.
  • 2}}+). Alternatively, caesium-137 may decay directly into barium-137 by a 0.4% probability beta emission.
  • alt=The stick and ball diagram shows three regular octahedra, which are connected to the next one by one surface and the last one shares one surface with the first. All three have one edge in common. All eleven vertices are purple spheres representing caesium, and at the center of each octahedron is a small red sphere representing oxygen.
  •  alt=27 small grey spheres in 3 evenly spaced layers of nine. 8 spheres form a regular cube and 8 of those cubes form a larger cube. The grey spheres represent the caesium atoms. The center of each small cube is occupied by a small green sphere representing a chlorine atom. Thus, every chlorine is in the middle of a cube formed by caesium atoms and every caesium is in the middle of a cube formed by chlorine.
  • alt=Y-shaped yellowish crystal in glass ampoule, looking like the branch of a pine tree
  • bibcode=2015NatCo...6.7943S}}</ref>
  • alt=Electrons beamed from an electron gun hit and ionize neutral fuel atoms; in a chamber surrounded by magnets, the positive ions are directed toward a negative grid that accelerates them. The force of the engine is created by expelling the ions from the rear at high velocity. On exiting, the positive ions are neutralized from another electron gun, ensuring that neither the ship nor the exhaust is electrically charged and are not attracted.
  • alt=A laboratory table with some optical devices on it.
  •  alt=Three middle-aged men, with the one in the middle sitting down. All wear long jackets, and the shorter man on the left has a beard.
  • alt=A white mineral, from which white and pale pink crystals protrude
  • Caesium crystals (golden) compared to [[rubidium]] crystals (silvery)
  • alt=A room with a black box in the foreground and six control cabinets with space for five to six racks each. Most, but not all, of the cabinets are filled with white boxes.
CHEMICAL ELEMENT WITH SYMBOL CS AND ATOMIC NUMBER 55
Cæsium; Cesium; Element 55; Radioactive cesium poisoning; Cs (element); Caesium compound; Caesium compounds; Compounds of caesium; Radioactive caesium poisoning; Cesium compounds; Cesium compound; Compounds of cesium; Сaesium; History of caesium
['si:z??m]
(US cesium)
¦ noun the chemical element of atomic number 55, a soft, silvery, rare, extremely reactive metal of the alkali metal group. (Symbol: Cs)
Origin
C19: from L. caesius 'greyish-blue' (because it has characteristic lines in the blue part of the spectrum).
Ejemplos de uso de caesium
1. Tonnes of radioactive strontium, caesium, iodine, and plutonium spread across millions of miles.
2. We are finding Caesium and Strontium in breast milk and the placenta.
3. But super–accurate caesium atomic clocks get out of sync with the rotation of the Earth.
4. Levels of Caesium–137 are expected to remain high all over Europe for decades, says the United Nations.
5. Other scientists report mammals experiencing heavy doses from internally deposited Caesium–137 and Strontium–'0 radioactive fallout.