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cesium 中文解釋 wordnet sense Collocation Usage Collins Definition
Noun
/ˈsēzēəm/,
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The chemical element of atomic number 55, a soft, silvery, extremely reactive metal. It belongs to the alkali metal group and occurs as a trace element in some rocks and minerals,
  1. The chemical element of atomic number 55, a soft, silvery, extremely reactive metal. It belongs to the alkali metal group and occurs as a trace element in some rocks and minerals

  1. a soft silver-white ductile metallic element (liquid at normal temperatures); the most electropositive and alkaline metal
  2. Caesium or cesium is the chemical element with the symbol Cs and atomic number 55. It is a soft, silvery-gold alkali metal with a melting point of 28 °C (83 °F), which makes it one of only five metals that are liquid at or near room temperature. ...
  3. Alternative spelling of caesium
  4. is a fission product of U-235. It emits beta and gamma radiation and can cause radiation sickness and death if exposures are high enough. ...
  5. Cesium is a naturally occurring element found combined with other elements in rocks, soil, and dust in low amounts. Nuclear explosions or the breakdown of uranium in fuel elements can produce two radioactive forms of cesium ^134Cs and ^137Cs. Both isotopes decay into non-radioactive elements. ...
  6. Symbol:"Cs" Atomic Number:"55" Atomic Mass: 132.91amu. One of the alkali metal group. This element can be found in many minerals. When pure it is a silvery-white color and is used in atomic clocks and photoelectric cells. It is one of three metals found in a liquid state at room temperature. ...
  7. An element that is chemically similar to sodium and potassium. Some victims of the Chernobyl accident, which occurred in April 1986 in the Ukraine, inhaled cesium-137 along with other radionuclides. Cesium-137 emits highly penetrating gamma radiation.
  8. A metallic element, symbol Cs, atomic number 55. British spelling caesium