英文字典中文字典Word104.com



中文字典辭典   英文字典 a   b   c   d   e   f   g   h   i   j   k   l   m   n   o   p   q   r   s   t   u   v   w   x   y   z   







請輸入英文單字，中文詞皆可：

caesium    
n. 銫[金屬元素]

銫[金屬元素]

caesium
n 1: a soft silver-white ductile metallic element (liquid at
normal temperatures); the most electropositive and alkaline
metal [synonym: {cesium}, {caesium}, {Cs}, {atomic number 55}]

caesium \caesium\, Caesium \C[ae]"si*um\(s[=e]"z[-e]*[u^]m), n.
[NL., from L. caesius bluish gray.] (Chem.)
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 number 55. Atomic weight 132.6.

Syn: cesium, Cs
[1913 Webster]

caesium
Symbol: Cs
Atomic number: 55
Atomic weight: 132.90545
Soft silvery-white metallic element belonging to group 1 of the periodic
table. One of the three metals which are liquid at room temperature.
Cs-133
is the natural, and only stable, isotope. Fifteen other radioisotopes
exist.
Caesium reacts explosively with cold water, and ice at temperatures
above
157K. Caesium hydroxide is the strongest base known. Caesium is the most
electropositive, most alkaline and has the least ionization potential of
all the elements. Known uses include the basis of atomic clocks,
catalyst
for the hydrogenation of some organic compounds, and in photoelectric
cells.
Caesium was discovered by Gustav Kirchoff and Robert Bunsen in Germany
in
1860 spectroscopically. Its identification was based upon the bright
blue
lines in its spectrum. The name comes from the latin word caesius, which
means sky blue. Caesium should be considered highly toxic. Some of the
radioisotopes are even more toxic.

請選擇你想看的字典辭典：
單詞字典翻譯
Caesium查看　Caesium　在Google字典中的解釋Google英翻中〔查看〕
Caesium查看　Caesium　在Yahoo字典中的解釋Yahoo英翻中〔查看〕

安裝中文字典英文字典查詢工具!


中文字典英文字典工具:
選擇顏色:
輸入中英文單字

































































英文字典中文字典相關資料:
  • Caesium - Wikipedia
    It has only one stable isotope, caesium-133 Caesium is mined mostly from pollucite Caesium-137, a fission product, is extracted from waste produced by nuclear reactors It has the largest atomic radius of all elements whose radii have been measured or calculated, at about 260 picometres
  • Cesium | Description, Symbol, Uses, Facts | Britannica
    cesium chemical element Also known as: Cs, caesium Emeritus Professor of Chemistry, Michigan State University, East Lansing, Mich James L Dye
  • Caesium - Element information, properties and uses | Periodic Table
    Caesium gets its name from the Greek for heavenly blue Not for its eyes (it's only an element!) but less romantically for the appearance of its emission spectrum in the spectroscope
  • Cesium Facts, Symbol, Discovery, Properties, Uses
    Cesium (pronounced as SEE-zee-em), sometimes spelled as caesium, is a highly reactive metal when exposed to air and water Denoted by the chemical symbol Cs, it belongs to the family of alkali metals [1]
  • Cesium Facts - Caesium or Cs - Science Notes and Projects
    Cesium (or caesium) is a soft, shiny, pale gold metal with the chemical symbol Cs and atomic number 55 It is the most electropositive and least electronegative element using the Pauling scale
  • Caesium | Cesium History, Uses, Facts, Physical Chemical Characteristics
    Caesium is considered the first element who was discovered spectroscopically in 1860 by Robert Bunsen and Gustav Kirchhoff They also derived its name from Latin caesius ‘’sky-blue’’ due to the formation of unique blue lines in the emission spectrum
  • Caesium - Wikiwand
    Caesium is a chemical element; it has symbol Cs and atomic number 55 It is a soft, silvery-golden alkali metal with a melting point of 28 5 °C, which makes it
  • WebElements Periodic Table » Caesium » the essentials
    This WebElements periodic table page contains the essentials for the element caesium
  • Cesium: Uses, Properties, and Applications in Medical Industrial Fields
    Explore the fascinating world of cesium, an alkali metal known for its crucial role in atomic clocks, medical treatments, and various industrial applications This comprehensive guide delves into its physical and chemical properties, reactivity, abundance, and the cutting-edge uses in scientific research and technology Learn about the safety measures and interesting facts surrounding this
  • Caesium - EniG. Periodic Table of the Elements
    Caesium was discovered by Robert Wilhelm Bunsen and Gustav Robert Kirchhoff (DE) in 1860 The origin of the name comes from the Latin word caesius meaning sky blue or heavenly blue It is a very soft, light grey, ductile metal that reacts readily with oxygen and reacts explosively with water





中文字典-英文字典  2005-2009

|中文姓名英譯,姓名翻譯 |简体中文英文字典