caesium$10586$ - ορισμός. Τι είναι το caesium$10586$
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Τι (ποιος) είναι caesium$10586$ - ορισμός

ISOTOPES OF CAESIUM
Isotopes of cesium; Caesium-134; Cesium-134; Caesium-135; Cesium-135; Cs-135; Cs-134; Caesium-136; Caesium-112; Caesium-113; Caesium-114; Caesium-115; Caesium-116; Caesium-117; Caesium-118; Caesium-119; Caesium-120; Caesium-121; Caesium-122; Caesium-123; Caesium-124; Caesium-125; Caesium-126; Caesium-127; Caesium-128; Caesium-129; Caesium-130; Caesium-131; Caesium-132; Caesium-133; Caesium-138; Caesium-139; Caesium-140; Caesium-141; Caesium-142; Caesium-143; Caesium-144; Caesium-145; Caesium-146; Caesium-147; Caesium-148; Caesium-149; Caesium-150; Caesium-151; Cs-133; Cesium-133; Cesium-136; Unperturbed ground state hyperfine transition frequency of the caesium 133 atom; Cesium-131; ΔνCs; Isotopes of Caesium; Caesium isotopes; Caesium isotope; Cesium isotopes; Cesium isotope

cesium         
  • 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 US spelling of caesium.
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.

Βικιπαίδεια

Isotopes of caesium

Caesium (55Cs) has 40 known isotopes, making it, along with barium and mercury, one of the elements with the most isotopes. The atomic masses of these isotopes range from 112 to 151. Only one isotope, 133Cs, is stable. The longest-lived radioisotopes are 135Cs with a half-life of 2.3 million years, 137
Cs
with a half-life of 30.1671 years and 134Cs with a half-life of 2.0652 years. All other isotopes have half-lives less than 2 weeks, most under an hour.

Beginning in 1945 with the commencement of nuclear testing, caesium radioisotopes were released into the atmosphere where caesium is absorbed readily into solution and is returned to the surface of the Earth as a component of radioactive fallout. Once caesium enters the ground water, it is deposited on soil surfaces and removed from the landscape primarily by particle transport. As a result, the input function of these isotopes can be estimated as a function of time.