Caesium - Precautions

Caesium (cesium in the United States) pronounced /ˈsiːziəm/; is a chemical element in the periodic table that has the symbol Cs and atomic number 55. It is a soft silvery-gold alkali metal which is one of at least three metals that are liquid at or near room temperature. This element is most notably used in atomic clocks. The variant spelling cesium is sometimes used, especially in North American English, but caesium is the spelling used by the ...

Including:

• Caesium - Notable characteristics
• Caesium - Applications
• Caesium - History
• Caesium - Occurrence
• Caesium - Isotopes
• Caesium - Precautions

Read more here: » Caesium: Encyclopedia - Caesium

The electromagnetic spectrum of caesium has two bright lines in the blue part of the spectrum along with several other lines in the red, yellow, and green. This metal is silvery gold in color and is both soft and ductile. Caesium is also the most electropositive and most alkaline of the stable chemical elements and also has the least ionization potential of all the elements, except for francium. Caesium is the least abundant of the five non-radioactive alkali metals. (Technically, francium is the least common alkali metal, but since it is highly radioactive with less than 30 grams in the entire earth at one time, its ab ...

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Caesium, Caesium - Notable characteristics, Caesium - Applications, Caesium - History, Caesium - Occurrence, Caesium - Isotopes, Caesium - Precautions

Read more here: » Caesium: Encyclopedia II - Caesium - Notable characteristics

An alkali metal, caesium occurs in lepidolite, pollucite (hydrated silicate of aluminium and caesium) and within other sources. One of the world's most significant and rich sources of this metal is located at Bernic Lake in Manitoba. The deposits there are estimated to contain 300,000 metric tons of pollucite at an average of 20% caesium. It can be isolated by electrolysis of fused cyanide and in a number of other ways. Exceptionally pure and gas-free caesium can be made by the thermal decomposition of caesium azide. The primary compounds of caesium are its chloride and its nitrate. The price of caes ...

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Caesium, Caesium - Notable characteristics, Caesium - Applications, Caesium - History, Caesium - Occurrence, Caesium - Isotopes, Caesium - Precautions

Read more here: » Caesium: Encyclopedia II - Caesium - Occurrence

Caesium is most notably used in atomic clocks, which are accurate to seconds in many thousands of years. Since 1967, the International System of Measurements bases its unit of time, the second, on the properties of caesium. SI defines the second as 9,192,631,770 cycles of the radiation which corresponds to the transition between two energy levels of the ground state of the caesium-133 atom. Cs-134 has been used in hydrology as a measure of caesium output by the nuclear power industry. This isotope is used because, while it is le ...

See also:

Caesium, Caesium - Notable characteristics, Caesium - Applications, Caesium - History, Caesium - Occurrence, Caesium - Isotopes, Caesium - Precautions

Read more here: » Caesium: Encyclopedia II - Caesium - Applications